Temperature compensation circuit and a variable gain...

Details Temperature compensation circuit and a variable gain... Temperature compensation circuit and a variable gain...

2005-01-18

2005-01-18

Shingleton, Michael B. (Department: 2681)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S256000

Reexamination Certificate

active

06844782

ABSTRACT:
A temperature compensation circuit comprises a signal source to output a first signal corresponding to a temperature change of an ambient temperature to a predetermined temperature, and a multiplier to multiply an external gain control signal and the first signal and output a second signal proportional to the temperature change and the first signal to a variable gain amplifier to perform the temperature compensation with respect to the variable gain amplifier.

REFERENCES:
patent: 5708420 (1998-01-01), Drouot
patent: 6028478 (2000-02-01), Seremeta et al.
patent: 6215989 (2001-04-01), Otaka
patent: 2002 141753 (2002-05-01), None
Riihihuhta et al. “A High Dynamic Range No MHz AGC-Amplifier With Linear and Temperature Compensatal Gain Control”.*
1994 IEEE International Symposium on Circuits and Systems, London, May 30, 1994 to Jun. 2, 1994 pp 521-524.*
Yamaji et al. “A Temperature-Stable CMOS Variable-Gain Amplifier With 80-dB Linearly Controlled Gain Range” IEEE Journal of Solid-State Circuits, vol. 37 Issue 5 May 2002 pp 553-558.*
Shoji Otaka, et al. “A Low-Power Low-Noise Accurate Linear-in-dB Variable-Gain Amplifier with 500-MHz Bandwidth”, IEEE Journal of Solid-State Circuits. vol. 35. No. 12. Dec. 2000, pp. 1942-1948.

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