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특허 상세정보

Variable attenuator having voltage variable FET resistor with chosen resistance-voltage relationship

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H01P-001/22   
미국특허분류(USC) 333/81R ; 307/540 ; 307/550 ; 307/568
출원번호 US-0192193 (1988-05-10)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 12  인용 특허 : 35
초록

A variable attenuator having first and second branch circuits configured in bridged T, T or PI topologies, each of the branch circuits having at least one voltage variable FET resistor. The voltage variable FET resistor includes a FET network comprising a plurality of FET segments each of which have a predetermined gate width and a voltage divider network including a plurality of fixed resistors coupled to the gates of the plurality of FET segments for providing a different predetermined gate voltage to each of the FET segments. The gate width of each of...

대표
청구항

A variable attenuator comprising: (a) a first branch circuit coupled to a source terminal and a load terminal, said first branch circuit including at least one voltage variable FET resistor having output and input terminals and a control voltage terminal; (b) a second branch circuit coupled to said first branch circuit and a common terminal, said second branch circuit including at least one voltage variable FET resistor having input and output terminals and a control voltage terminal; (c) each of said voltage variable FET resistors comprising: (i) a FET ...

이 특허에 인용된 특허 (35)

  1. Parsons Dale W. (Tulsa OK). Apparatus for calibrating tape drive read system. USP1987084688113.
  2. Southard James S. (Union MI). Attenuator network for musical instrument keying system. USP1976083977291.
  3. Takada Shigeho (Oita JPX). Automatic gain control circuit. USP1981034255716.
  4. Stenbock, Roger M.. Automatic trigger sensitivity adjustment circuit. USP1985124562362.
  5. Rumelhard Christian (Creteil FRX). Biasing circuit for a field effect transistor. USP1987084686387.
  6. Knapp Richard P. (Hermosa Beach CA). Biasing method for improved performance in field effect devices. USP1985014496909.
  7. Lehmann Klaus (Mhltal DEX). Broadband circuit with rapidly variable resistor. USP1983074395643.
  8. Schmidt ; Robert H.. Brushless DC tachometer circuit. USP1978054088943.
  9. Dolby Ray M. (3340 Jackson St. San Francisco CA 94118). Circuit arrangements for modifying dynamic range using series and parallel circuit techniques. USP1987104701722.
  10. Brehm, Gailon E.; Lehmann, Randall E.. Common-gate GaAs FET design for monolithic microwave integrated circuits. USP1985104549197.
  11. Cranford ; Jr. Hayden Clavie (Durham NC) Hoffman Charles Reeves (Raleigh NC). Compensating current source. USP1977014004164.
  12. Hoover ; Merle Vincent. Complementary symmetry FET mixer circuits. USP1978054090139.
  13. Moog Robert A. (East Aurora NY). Compressor-expander for a musical instrument. USP1980054202238.
  14. Naster Ronald J. (Liverpool NY) Windyka John A. (Liverpool NY) Wolfe Allen R. (Sauquoit NY). Continuously variable phase shifting element comprised of interdigitated electrode MESFET. USP1986084605912.
  15. Fushiki, Tatsuo. Device for generating a variable control signal. USP1985104549098.
  16. Hwang Ying C. (Liverpool NY) Chen Young K. (Syracuse NY) Ragonese Louis J. (Liverpool NY). Digitally controlled wideband phase shifter. USP1987014638190.
  17. Knapp Richard P. (Hermosa Beach CA). Field effect transconductance amplifiers. USP1980124241316.
  18. Fujita Hiro (Sayama JPX) Tsuzuki Akira (Tokorozawa JPX) Ebiha Heihachiro (Tokorozawa JPX) Sekiya Fukuo (Tokorozawa JPX). Frequency division system. USP1981014244043.
  19. Palmer Charles D. (Fairview TX). GaAs monolithic medium power amplifier. USP1987024646028.
  20. Li Jim Y. (Portland OR) Weiss Frederick G. (Portland OR). GaAs voltage reference generator. USP1987084686451.
  21. Yoshida Isao (Hinodemachi JPX) Nagata Minoru (Kodaira JPX) Ochi Shikayuki (Akishima JPX) Katto Hisao (Hinodemachi JPX). High-voltage circuit for insulated gate field-effect transistor. USP1982024317055.
  22. Okada Yoshio (Tokyo JPX) Shimizu Mitsuru (Sakura JPX). Intermediate potential generation circuit. USP1987054663584.
  23. Watrous ; Donald L. ; Dobberphul ; Daniel W.. Method and apparatus for operating a semiconductor integrated circuit at minimum power requirements. USP1978064093909.
  24. Larson Ronald K. (San Jose CA). Method and means to minimize risetime of a microwave pulse modulated signal from a frequency multiplier circuit. USP1984014425515.
  25. Merrill, Dana A.. Multiple rate baseband receiver. USP1985114555788.
  26. Beaubien Randall S. (Westlake Village CA) Erps Lorri A. (Pleasanton CA). Process for making a T-gated transistor. USP1987104700462.
  27. Murphy ; Desmond Lewis. Programmable attenuator apparatus employing active FET switching. USP1978104121183.
  28. Hoshi Katsuji (Tokyo JPX). Reference voltage generator circuit. USP1983034375596.
  29. Sahara, Hiroshi; Tanaka, Yutaka. Signal level control circuit. USP1976073968452.
  30. Merrick, Edwin B.. Transducer coupling. USP1985104546651.
  31. Bradley Stevan D. (East Palo Alto CA). Unmatched field effect transistors providing matched voltage-controlled resistances. USP1977044016481.
  32. Scott Bentley N. (Richardson TX) Brehm Gailon E. (Plano TX). Varactor trimming for MMICs. USP1988014719434.
  33. Ohashi Shin-ichi (Toyokawa JA) Asada Akihiro (Kodaira JA). Variable impedance circuit. USP1977084039981.
  34. Konishi Satoshi (Tokyo JPX). Voltage reference circuit for providing a predetermined voltage to an active element circuit. USP1987034649291.
  35. Colles Joseph H. (Oceanside CA). Wideband linear video contrast control. USP1981034257064.

이 특허를 인용한 특허 피인용횟수: 12

  1. Ashry Othman, Ahmed Mohammad. Apparatus and methods for high linearity voltage variable attenuators. USP2018019882549.
  2. Hedberg Mats Olof Joakim,SEX. Connecting arrangement for selectively presenting resistive properties using transistors. USP2001086281740.
  3. Golio John M. (Chandler) Golio Janet R. J. (Chandler) Staudinger Joseph (Chandler AZ). Digitally controlled field effect attenuator devices. USP1991035001524.
  4. Ashry Othman, Ahmed Mohammad. High frequency signal attenuators. USP2017039590591.
  5. McCarthy, Daniel P.; Connell, Lawrence E.; Hollenbeck, Neal W.. Linear voltage controlled variable attenuator with linear DB/V gain slope. USP2012038131241.
  6. McCarthy,Daniel P.; Connell,Lawrence E.; Hollenbeck,Neal W.. Linear voltage controlled variable attenuator with linear DB/V gain slope. USP2009037505748.
  7. Huber Jakob (Beyharting DEX) Meier Wolfgang (Munich DEX). Monolithically integratable microwave attenuation element. USP1991024996504.
  8. Jordan, Edward Perry. Multiple ramp variable attenuator. USP2014118890598.
  9. Kamali, Walid; Skrobko, John. Optical receiver having an open loop automatic gain control circuit. USP2009107599629.
  10. Ito, Koichi. Resistor circuit. USP2010027659765.
  11. Tse, Lawrence T.; Davis, Michael A.; Stratakos, Anthony J.. Testing integrated circuits and integrated power transistors. USP2004076759856.
  12. Ashry Othman, Ahmed Mohammad; Esmael, Mohamed Moussa Ramadan. Voltage variable attenuator, an integrated circuit and a method of attenuation. USP20181010103712.