Linear-in-dB variable gain amplifier

Details Linear-in-dB variable gain amplifier Linear-in-dB variable gain amplifier

2005-07-19

2005-07-19

Nguyen, Khanh V. (Department: 2817)

Amplifiers

With periodic switching input-output

C330S051000

Reexamination Certificate

active

06919760

ABSTRACT:
A linear-in-dB variable gain amplifier is provided, which approximates gain control characteristics to approximate Linear-in-dB characteristics. A gain G is determined so as to have approximate Linear-in-dB characteristics passing through the maximum value, minimum value, and intermediate value of the gain by a capacitance ratio between capacitance of a higher order capacitor string composed of n capacitors or a lower order capacitor string composed of m capacitors selectively connected in parallel to an input fixed capacitor, and capacitance of a lower order capacitor string, a first correction capacitor string composed of n capacitors, or a second correction capacitor string composed of m capacitors selectively connected in parallel to a feedback loop fixed capacitor, in accordance with a gain control signal (Code) of lower order m bits and higher order n bits.

REFERENCES:
patent: 5973536 (1999-10-01), Maejima
patent: 6628164 (2003-09-01), Ramesh et al.
Nishio, et al., “A CMOS Analog Front-End Chip-Set for Mega Pixel Camcoders”, Technical Report of IEICE published by The Institute of Electronics, Information and Communications Engineers, 2000, pp. 1-6.

Affiliated with

Also associated with

Rating

Linear-in-dB variable gain amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Linear-in-dB variable gain amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear-in-dB variable gain amplifier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3432842