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Automatic gain control circuit for controlling multiple variable gain amplifier stages while estimating received signal power

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H03G-003/20
출원번호 US-0130393 (1998-08-06)
발명자 / 주소
  • Black Peter J.
출원인 / 주소
  • Qualcomm Incorporated
대리인 / 주소
    Clark
인용정보 피인용 횟수 : 43  인용 특허 : 7

초록

The present invention is a novel and improved AGC circuit which is generically configurable to accommodate a variety of AGC amplifier configurations to enhance IP3 performance and reduce required amplifier current, while providing a received power estimate which remains valid regardless of how the g

대표청구항

[ I claim:] [1.] An apparatus for gain control comprising:linear gain control means for producing a first variable gain value in response to an overall gain value whereby:said first variable gain value is zero while the overall gain is less than a first predetermined threshold;said first variable ga

이 특허에 인용된 특허 (7)

  1. Matsuo Tomohide,JPX, Automatic gain control circuit capable of compensating variation of reception level with wide range.
  2. De Loe ; Jr. John P. (Decatur GA), Automatic gain control circuit for both receiver and transmitter adjustable amplifiers including a linear signal level d.
  3. Wheatley ; III Charles E. (Del Mar CA), Linear gain control amplifier.
  4. Wilson Nathaniel B. (San Diego CA), Linearized digital automatic gain control.
  5. Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatley ; III Charles E. (Del Mar CA), Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system.
  6. Kroeger Brian W. (Ellicott City MD) Kurtz John J. (Catonsville MD), Speech enhancement system having dynamic gain control.
  7. Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Weaver ; Jr. Lindsay A. (San Diego CA), Spread spectrum multiple access communication system using satellite or terrestrial repeaters.

이 특허를 인용한 특허 (43)

  1. Vilhonen, Sami; Vaara, Sami, Arrangement for saving energy in transmitter.
  2. Jeong,Hong seok; Hwang,Tae don, Automatic gain control apparatus for video signal and adjusting method thereof.
  3. Abe, Shuji; Kudo, Katsuya, Automatic gain control circuit and receiver having the same.
  4. Chan, Wen-Yen; Khan, Nasserullah, Control of switcher regulated power amplifier modules.
  5. Chan, Wen-Yen; Khan, Nasserullah, Control of switcher regulated power amplifier modules.
  6. Chan, Wen-Yen; Khan, Nasserullah, Control of switcher regulated power amplifier modules.
  7. Hassan, Muhammad; Tang, Yiwu; van Zalinge, Klaas; Wang, Chuan; Pan, Dongling, Current-efficient low noise amplifier (LNA).
  8. Maru, Tsuguo, Digital automatic gain control linearizer and digital automatic gain control circuit using the same.
  9. Schaffer,Troy A.; Hulyalkar,Samir N.; Shah,Anand M., Dual loop automatic gain control.
  10. Kozak, Marian; Raphaeli, Dan, Dynamic automatic gain control circuit employing kalman filtering.
  11. Elyada, Ori, Dynamic gain switching digital to analog converter.
  12. Sun, Bo, High linearity low noise amplifier.
  13. Chan, Wen-Yen; Khan, Nasserullah, Input drive control for switcher regulated power amplifier modules.
  14. Chan, Wen-Yen; Khan, Nasserullah, Input drive control for switcher regulated power amplifier modules.
  15. Chan, Wen-Yen; Khan, Nasserullah, Input drive control for switcher regulated power amplifier modules.
  16. Yavuz, Mehmet; Black, Peter; Nanda, Sanjiv, Interface management in wireless communication system using hybrid time reuse.
  17. Black, Peter J.; Fan, Mingxi; Vanichpun, Sarut; Yavuz, Mehmet, Interference management in a wireless communication system using frequency selective transmission.
  18. Yavuz, Mehmet; Black, Peter; Nanda, Sanjiv, Interference management utilizing power and attenuation profiles.
  19. Tokgoz, Yeliz; Yavuz, Mehmet; Meshkati, Farhad, Method and apparatus for adjusting rise-over-thermal threshold.
  20. Chan, Wen Yen M.; Khan, Nasserullah; Jiao, Qingzhong; Sangary, Nagula Tharma; Habicher, Michael Franz; Jin, Xin, Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios.
  21. Chan, Wen-Yen M.; Khan, Nasserullah; Jiao, Qingzhong; Sangary, Nagula Tharma; Habicher, Michael Franz; Jin, Xin, Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios.
  22. Chan, Wen-Yen; Khan, Nasserullah; Habicher, Michael; Sangary, Nagula Tharma; Jiao, Qingzhong; Jin, Xin, Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios.
  23. Chan, Wen-Yen; Khan, Nasserullah; Jiao, Qingzhong; Jin, Xin; Sangary, Nagula Tharma; Habicher, Michael Franz, Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios.
  24. Chan, Wen-Yen; Khan, Nasserullah; Jin, Xin; Sangary, Nagula Tharma; Habicher, Michael Franz; Jiao, Qingzhong, Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios.
  25. Chan,Wen Yen; Khan,Nasserullah; Jiao,Qingzhong; Jin,Xin; Sangary,Nagula Tharma; Habicher,Michael Franz, Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios.
  26. Chan, Wen-Yen; Jiao, Qingzhong; Jin, Xin; Khan, Nasserullah, Method and apparatus for optimizing transmitter power efficiency.
  27. Chan, Wen-Yen; Khan, Nasserullah; Jin, Xin; Jiao, Qingzhong, Method and apparatus for optimizing transmitter power efficiency.
  28. Jin,Xin; Jiao,Qingzhong; Chan,Wen, Method and apparatus for optimizing transmitter power efficiency.
  29. Masaki Ichihara JP, Method and circuit for controlling baseband gain.
  30. Chan, Wen-Yen; Khan, Nasserullah; Chung, Ian Ka Yin; Bari, Hamza Mohaimeen, Method of power amplifier switching power control using post power amplifier power detection.
  31. Chan, Wen-Yen; Khan, Nasserullah; Chung, Ian Ka Yin; Bari, Hamza Mohaimeen, Method of power amplifier switching power control using post power amplifier power detection.
  32. Groe,John; Farias,Naone; Costa,Damian; Nejati,Babak, Multi-segment gain control system.
  33. Sabah Khesbak ; Madhukar Reddy ; Pramote Piriyapoksombut ; Trevor Robinson, Power amplifier driver system for wireless handset.
  34. Yun,Jeong Pil, RF switch.
  35. Hayashihara, Mikio, Radio transmitter-receiver, high-frequency radio receiver, and control unit.
  36. Hosokawa, Yoshifumi; Hayashi, George; Kanno, Ippei, Receiver circuit and receiver apparatus including the same.
  37. Br체ckmann,Dieter; Neubauer,Andr챕, Receiver circuit for mobile radio receivers with automatic gain control.
  38. Ruelke,Charles R.; Ben Ayun,Moshe; Graham,David J.; Rozental,Mark, Receiver with automatic gain control that operates with multiple protocols and method thereof.
  39. Yun, Seok-Ju; Kang, Joonseong; Hong, Young-Jun, Receiving method and apparatus.
  40. Tasic, Aleksandar Miodrag; Narathong, Chiewcharn; Sahota, Gurkanwal Singh; Patel, Shrenik, Spectrum sensing radio receiver.
  41. Chen, Zhiliang Julian, System and method of dual mode automatic gain control for a digital radio receiver.
  42. Hara, Yoshihiro; Matsuura, Toru, Transmission device and wireless communication apparatus.
  43. Toshikazu Nakajima JP, Transmission power amplification method and apparatus.
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