(12)
`
`United States Patent
`Sorrells et al.
`
`(10) Patent N0.:
`(45) Date of Patent:
`
`US 6,687,493 B1
`Feb. 3, 2004
`
`US006687493B1
`
`(54) METHOD AND CIRCUIT FOR
`DOWN-CONVERTING A SIGNAL USING A
`
`FOREIGN PATENT DOCUMENTS
`
`
`
`COMPLEMENTARY FET STRUCTURE FOR IMPROVED DYNAMIC RANGE
`
`
`
`35 DE
`
`
`
`é; 196 27 640 A1
`
`1/1997
`
`
`
`""""" " .......... .. H03D/7/12
`
`(75) Inventors: David F. Sorrells, Jacksonville, FL
`(US); Michael J. Bultman,
`Jacksonville, FL (US); Robert W.
`Cook, SWitZerland, FL (Us); Richard
`C- Looke, Jacksonvlne, FL (Us);
`Charley D. Moses, Jr., Jacksonville,
`FL (Us); Michael W- Rawlills, Lflke
`Mary, FL (Us); Gregory 5- Rawlllls,
`Lake Mary, FL (Us)
`.
`_
`.
`.
`_
`(73) Assignee. Plagkervlslon, Inc., Jacksonville, FL
`(
`)
`Subject to any disclaimer, the term of this
`.
`.
`patent is extended or adJusted under 35
`U_S_C_ 154(k)) by 0 days_
`
`( * ) Notice:
`
`(21) Appl. No.: 09/293,342
`(22) Filed:
`Apr. 16, 1999
`
`Related US Application Data
`
`(63) Continuation-in-part of application No. 09/176,022, ?led on
`Oct. 21, 1998.
`
`(51) Int. Cl.7 ................................................ .. H04B 1/26
`
`(52) US. Cl. ...................... .. 455/323; 455/313; 455/333
`
`(58) Field of Search ......................... .. 455/191.1, 195.1,
`455/290, 193.1, 313, 323, 326, 333, 341;
`370/278; 363/17
`
`(56)
`
`_
`References Clted
`U.S. PATENT DOCUMENTS
`
`2,057,613 A 10/1936 Gardner
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`(List continued on neXt page.)
`
`11200\
`
`11202
`
`(List continued on neXt page.)
`
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`English—language Abstract of Japanese Patent Publication
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`(Mar. 24, 1988—Date of publication of application).
`(List Continued on next a Q)
`P g
`_
`_
`Primary Examiner—Lester G. Kincaid
`(74) Attorney, Agent, or Firm—Sterne, Kessler, Goldstein
`& FOX PLLC
`(57)
`
`ABSTRACT
`
`Methods, systems, and apparatuses for doWn-converting an
`electromagnetic (EM) signal by aliasing the EM signal are
`described herein Brie?y Stated, Such meth0d5> Systems, and
`apparatuses operate by receiving an EM signal and an
`aliasing signal having an aliasing rate. The EM signal is
`aliased according to the aliasing signal to down-convert the
`EM signal. The term aliasing, as used herein, refers to both
`down-converting an EM signal by under-sampling the EM
`signal at an aliasing rate, and doWn-converting an EM signal
`by transferring energy from the EM signal at the aliasing
`rate. In an embodiment, the EM signal is doWn-converted to
`an intermediate frequency (IF) signal. In another
`embodiment, the EM signal is doWn-converted to a demodu
`lated baseband information signal. In another embodiment,
`the EM signal is a frequency modulated (FM) signal, Which
`is doWn-converted to a non-FM signal, such as a phase
`
`modulated (PM) signal or an amplitude modulated signal.
`
`31 Claims, 178 Drawing Sheets
`
`11208
`
`0
`EH SIGNAL
`
`11220
`
`ALIASING
`SIGNAL
`
`11212
`
`1
`
`11211
`
`11211
`
`3
`110111
`
`EUSNIVGE'mED
`
`11240
`/
`
`11230\i
`I
`
`'
`
`Farmwald and RPX Exhibit 1073, pg. 1
`Farmwald and RPX v. ParkerVision
`IPR2014-00948
`
`

`

`US 6,687,493 B1
`Page 2
`
`U.S. PATENT DOCUMENTS
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`
`Farmwald and RPX Exhibit 1073, pg. 2
`Farmwald and RPX v. ParkerVision
`IPR2014-00948
`
`

`

`US 6,687,493 B1
`Page 3
`
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`
`Farmwald and RPX Exhibit 1073, pg. 3
`Farmwald and RPX v. ParkerVision
`IPR2014-00948
`
`

`

`5,555,453
`5,557,641
`5,557,642
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`5,574,755
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`5,584,068
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`5,606,731
`5,608,531
`5,610,946
`RE35,494
`5,617,451
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`5,628,055
`5,630,227
`5,633,815
`5,638,396
`5,640,415
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`5,663,878
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`5,675,392
`5,678,220
`5,680,078
`5,680,418
`5,689,413
`5,694,096
`5,699,006
`5,705,949
`5,705,955
`5,710,998
`5,714,910
`5,715,281
`5,721,514
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`5,724,653
`5,729,577
`5,729,829
`5,732,333
`5,736,895
`5,737,035
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`5,748,683
`5,757,870
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`5,760,645
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`5,767,726
`5,768,118
`5,768,323
`5,770,985
`5,771,442
`5,777,692
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`
`

`

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`IPR2014-00948
`
`

`

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