United States Patent (19)
`Yamasaki
`
`11)
`45)
`
`4,352,091
`Sep. 28, 1982
`
`(54) RADIO PAGER HAVING OPTIONAL
`ANNUNCATING MEANS
`75 Inventor:
`Koji Yamasaki, Tokyo, Japan
`73 Assignee: Nippon Electric Co., Tokyo, Japan
`21 Appi. No.: 109,306
`22) Filed:
`Jan. 3, 1980
`(30)
`Foreign Application Priority Data
`Jan. 8, 1979 JP
`Japan ............................... 54-1026U
`51
`int. Cl........................... G08B7/00; H04B5/04;
`HO4M 11/02
`52 U.S. Cl. .................................. 340/311.1; 455/233
`(58) Field of Search ..................... 340/311.1; 367/199;
`455/54, 227, 228, 230, 233,267
`References Cited
`U.S. PATENT DOCUMENTS
`3,716,848 2/1973 Schonholtz et al.............. 340/311.
`4,072,903 2/1978 Harris............................... 340/311.1
`
`(56)
`
`Primary Examiner-Donald J. Yusko
`Attorney, Agent, or Firm-Laff, Whitesel, Conte & Saret
`57
`ABSTRACT
`A radio paging receiver uses a receiver section for re
`ceiving and demodulating paging signals. A decoder
`section decodes the paging signals and a tone is gener
`ated in response thereto. When the center of slide
`switch is in normal position, the tone signals are recti
`fied by a diode and applied to a speaker in order to
`generate subscriber alert tones. When the center of slide
`switch is in vibration position, the speaker does not
`generate any audible tones while a rectifier-integrator
`section is turned on to rectify and integrate the tone
`signals. The rectified and integrated tone signals acti
`vate a mechanical vibrator to tactilely inform the sub
`scriber that he is being paged. The decoder section has
`a common output terminal for both the audible alert and
`the tactile vibration alert.
`
`5 Claims, 2 Drawing Figures
`
`
`
`DECODER 2
`
`RECFER 25
`
`------- 205
`
`CONTROL SWITCH 23
`
`Qualcomm, Exh. 2013, p. 1
`Apple v. Qualcomm, IPR2018-01275
`
`

`

`U.S. Patent
`
`Sep. 28, 1982
`
`Sheet 1 of 2
`
`4,352,091
`
`
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`
`
`©2 H O LINNS TIO?HLNOD
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`Qualcomm, Exh. 2013, p. 2
`Apple v. Qualcomm, IPR2018-01275
`
`

`

`U.S. Patent Sep. 28, 1982
`
`Sheet 2 of 2
`
`4,352,091
`
`2OO ~4OO in SEC
`
`III III
`
`Qualcomm, Exh. 2013, p. 3
`Apple v. Qualcomm, IPR2018-01275
`
`

`

`RADIO PAGER HAVING OPTIONAL
`ANNUNCATING MEANS
`
`15
`
`This invention relates to radio paging, receivers
`which not only have ordinary alert tone generating
`means, but also may have means for generating mechan
`ical vibrations, either in addition to or in place of the
`alert tones.
`Compact radio paging receivers have recently come
`10
`to the extensively used in many different places and
`manners. Thus, it becomes increasingly difficult to ade
`quately meet these extensive needs unless means are
`provided for paging by mechanical vibration in addition
`to alert tones.
`Paging receivers in prior art more often than not use
`alert tones for paging. They have the disadvantage of
`requiring a substantial redesign of their decoder section
`when they are to be supplemented with paging means
`using mechanical vibration. Furthermore, since circuits
`in these compact paging receivers are integrated to a
`considerable extent, the redesign of their decoder sec
`tion would require redesigning of their integrated cir
`cuits. Thus, it impossible for the manufacturer to re
`spond to a customer's demand with sufficient prompt
`25
`ness. There is another disadvantage since a provision of
`an additional signal output terminal, for driving the
`mechanical vibration elements, would entail an increase
`in the number of terminals required by the integrated
`circuits, which would prevent the reduction of receiver
`COStS.
`An object of the present invention, therefore, is to
`provide a radio paging receiver which enables economi
`cal addition of paging means using signals other than
`alert tones, without requiring either a redesign of the
`decoder circuit having a conventional alert tone output
`or any increase in number of receiver terminals.
`In accordance with this invention, a radio paging
`receiver has: a receiver section for receiving and de
`modulating paging signals. A decoder section decodes
`40
`the paging signals, to cause a generation of tone signals.
`A first terminal leads these tone signals out; to a speaker
`for generating alert tones. Second and third terminals
`provide connections for rectifying the tone signals, and
`are coupled between the first terminal and the speaker.
`45
`Therefor a fourth terminal provides a connection to a
`mechanical vibrator which is also connected to the
`third terminal and is capable of acting in response to the
`output of the rectifying means. A fifth terminal provides
`for supplying the rectifying means with the tone signals,
`50
`which act as signals. A sixth terminal provides for con
`trolling the tone signals which are to be supplied to the
`speaker means and further for controlling the supplying
`eaS.
`The advantages and features of the present invention
`will be more apparent from the detailed description
`hereunder, taken in conjunction with the accompanying
`drawings wherein:
`FIG. 1 is a schematic circuit diagram of one embodi
`ment of this invention; and
`FIG. 2 shows waveforms at different points in the
`circuit of FIG. 1 to supplement the explanation thereof.
`A carrier modulated with tone signals having a pre
`determined composition is received by an antenna 10
`and fed to a receiversection 11. The receiversection 11,
`65
`which may be a commonly used FM demodulator for
`instance, demodulates the signals and generates the tone
`signals. The tone signals are composed as shown in
`
`4,352,091
`2
`waveform A of FIG. 2, for example. Upon hearing the
`first and second tone signals, the subscriber holding the
`receiver knows that he is being paged.
`The demodulated first and second tone signals (pag
`ing signals), after being amplified by a tone amplifier
`100, are supplied to tone filters, 101 and 101" (reed filters
`for instance). Out of the paging signals, the filter 101
`selects the first tone and the filter 101' selects the second
`tone. The outputs of the filters 101 and 101" are repre
`sented by waveforms B and B' (FIG. 2), respectively.
`The output signals B and B' of the filters are rectified by
`detectors 102 and 102', respectively, and converted into
`digital signals (represented by waveforms C and C,
`respectively in FIG. 2). The output C of the first tone
`detector 102 is delayed by a delay circuit 103 for a
`period equal to the transmit time of the first tone so that
`the rise times of the first and second tones are synchro
`nized waveform (D in FIG. 2). An AND gate 104 uses
`the logical product of these signals C" and D, and turns
`out a signal E waveform E in FIG. 2), but only pro
`vided that the first and second signals have been re
`ceived consecutively.
`In response to the signal E, a timer circuit 105 gives
`a signal F to actuate a first self-oscillating multivibrator
`106 for a certain duration (5 to 10 sec) as represented by
`waveform F in FIG. 2. Only when the output F of the
`timer circuit 105 is high, the self-oscillating multivibra
`tor 106 supplies the next self-oscillation multivibrator
`107 with a square wave G waveform (G in FIG. 2)
`having a certain period (200 to 400 msec). The second
`self-oscillation multivibrator 107 has a higher oscillating
`frequency (1 to 2 KHz, alert tone frequency) than the
`first self-oscillation multivibrator 105 has, and sends out
`a tone signal H, as represented by waveform H in FIG.
`2, in response to the signal G.
`The circuit structure so far described, from the recep
`tion and demodulation of tone signals in the decoder
`section 12 to obtain the tone signal (H), can be replaced
`with, for instance, the paging receiver invented by
`McGarvey (U.S. Pat. No. 3,670,242), and the tone sig
`nal detecting circuit invented by Mori et al. (U.S. Pat.
`No. 4,127,846). In any of these structures, the tone sig
`nal H is obtained when paging takes place, and the
`decoder section 12 is usually composed of integrated
`circuits (IC) for the sake of compactness.
`The tone signal Happears at a terminal 201 and is fed
`to an audio amplifier 18 through a diode 13 and a resis
`tor 16 if the central terminal SC of the slide 231 of
`switch23 is in its normal position NOR. The tone signal
`H is amplified by the audio amplifier 18 and supplied to
`a speaker 21. One of the speaker terminals is grounded
`via the slide switch 231, and the speaker 21 generates an
`alert tone.
`On the other hand, if the central terminal SC of the
`slide 231 is set in its vibrating position VIB, the tone.
`signal Hobtained from the decoder 12 is supplied to the
`audio amplifier 18 and to a switch circuit 19. The tone
`signal amplified by the audio amplifier 18 is applied to
`the speaker 21; however since the other terminal of the
`speaker 21 is not grounded via the slide switch 231, the
`amplified signal is impressed on a transistor switch 17
`through a resistor 20. This signal turns on the switch 17.
`At this time, the audio signal is current-limited by a
`resistor 20 to prevent the speaker 21 from generating
`the alert tone. When the transistor switch 17 is turned
`on, the diode 13, a capacitor 14 and the resistor 16 con
`stitute a integration circuit to convert the tone signal H
`into a certain D.C. voltage waveform (I in FIG. 2).
`
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`Qualcomm, Exh. 2013, p. 4
`Apple v. Qualcomm, IPR2018-01275
`
`

`

`5
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`20
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`4,352,091
`4.
`3
`response to said control signal, and for selectively
`After being amplified by the audio amplifier 18, the
`supplying one of said rectified tone signal and the
`rectified signal is applied to the base of the transistor
`rectified and integrated tone signal to a second
`switch 17 in order to keep it switched on. The lapse of
`output terminal;
`time is infinitesimal from the generation of the tone
`speaker means coupled between said second output
`signal H to the arrival at this constant state.
`The integrating signal I of the tone signal is also im
`terminal and said control signal input terminal for
`generating an audible alert tone in response to said
`pressed on the switch circuit 19 to turn on transistors
`rectified tone signal, and for supplying said recti
`Tr1 and Tr2. A driving voltage waveform (J in FIG. 2)
`from a battery 24 is impressed, through the slide switch
`fied and integrated tone signal to said control signal
`input terminal, as said control signal, without any
`231, on and actuates a mechanical vibrator 22. The
`10
`resulting vibration tactilely informs the holder of the
`audible alert tone;
`paging receiver that he is being paged. As the tone
`mechanical vibrator means coupled between said
`signal H is terminated, the capacitor 14 ceases to be
`second output terminal and a switch terminal for
`charged and the vibrator 22 is promptly stopped. A
`producings mechanical vibration in response to
`discharge resistor 15 connected to the two ends of the
`said rectified and integrated tone signal; and
`15
`capacitor 14 deprives the capacitor of its stored charge.
`control circuit means coupled to said control signal
`With the drop in voltage at both ends of the capacitor
`input terminal and said switch terminal for selec
`14, the switch circuit 19 is turned off, and the vibration
`tively supplying an activating voltage from said
`of the mechanical vibrator 22 stops.
`power supply means to one of said speaker means
`If the mechanical vibrator 22 is to be driven without
`and said mechanical vibrator means.
`using the circuit structure of FIG. 1, the driving signal
`2. A radio paging receiver as claimed in claim 1,
`J can be obtained by actuating the switch circuit of the
`wherein said control circuit means comprises a manual
`vibrator with the timer output signal F. In this case,
`switch for selectively applying the output said power
`however, it will be necessary to provide the decoder
`supply means to one of said control signal input termi
`section 12 with an output terminal 206 for the signal F,
`25
`nal and said switch terminal.
`separately from the tone signal output terminal 201.
`3. The receiver of claim 2 wherein said decoder
`Because the decoder section 12 is more likely than not
`means comprises two parallel filter means turned to
`to be an integrated circuit, the optional addition of a
`respond to two separate signal frequencies, means for
`paging function, using mechanical vibration, to an exist
`converting each of said tones into a separate digital
`ing pager would invole an increase of IC pins or termi
`30
`signal, means for synchronizing said digital signals, and
`nal in the decoder section 12 to permit the supplementa
`means responsive to said synchronizing means for giv
`tion of an output terminal 206. The redesigning of inte
`ing said tone signal provided that said two signal fre
`grated circuits requires enormous time and costs, and
`quencies are received with a predetermined time rela
`accordingly is undesirable. Incidentally, the driving
`tionship.
`circuit for the mechanical vibrator 22, rectifier and
`35
`4. A radio paging tone receiver having at least a
`integrator section 25, switch circuit 19 and vibrator 22
`decoder means constructed on an integrated circuit
`in FIG. 1 are constructed to be optionally detachable
`chip having a single output terminal, said decoder
`from the terminals 201 through 205.
`means selectively responding to a radio signal including
`As hitherto stated, the present invention permits any
`a predetermined combination frequencies which
`existing pager, but only if it can issue a tone signal, to be
`uniquely identify said paging receiver, first means re
`readily supplemented with mechanical vibrator paging,
`sponsive to an output signal from said chip for driving
`in addition to its alert tone paging system, without re
`a loudspeaker to sound an audible alert tone indicating
`quiring any remodelling of its receiver or decoder sec
`a page, second means also responsive to said output
`tion.
`signal from said chip for driving a vibrator to give a
`What is claimed is:
`tactile alert signal indicating said page, and means for
`1. A radio paging receiver comprising:
`selecting between said first and second means, whereby
`power supply means;
`-
`either an audible or a tactile alert paging signal may be
`receiver means for receiving and demodulating pag
`given from the same integrated circuit chip without
`ing signals to provide a demodulated signal;
`requiring any change in the structure of said chip.
`decoder means coupled to the output of said receiver
`5. The receiver of claim 4 wherein said selecting
`means for decoding said demodulated signal to
`means enables a switch to operate responsive to said
`provide a tone signal at a first output terminal;
`output signal when said selecting means is positioned to
`means including an input terminal for causing a con
`select said second means, said operated switch means
`trol signal to appear;
`inhibiting said loud speaker when said output signal is
`rectifier-integrator circuit means coupled to said first
`present.
`output terminal for rectifying said tone signal, for
`selectively integrating the rectified tone signals in
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`t
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`Qualcomm, Exh. 2013, p. 5
`Apple v. Qualcomm, IPR2018-01275
`
`