Fine step and large gain range programmable gain amplifier

Details Fine step and large gain range programmable gain amplifier Fine step and large gain range programmable gain amplifier

2006-08-29

2006-08-29

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

Reexamination Certificate

active

07098738

ABSTRACT:
A programmable gain amplifier with three stages uses fine steps, has a large gain range, and is monotonic. The first stage comprises several amplifiers, each including a resistive feedback loop. The feedback loop comprises a series of resistors, with each resistor acting as a tap. Since the number of resistors in the loop is unchanging, monotonicity and stability is guaranteed when resistance is increased using successive taps. A switch system connects two taps at a time to an interpolation stage. Each of these taps corresponds to a specific resistor level, and thus a gain level. The interpolation stage uses a plurality of current sources inside a feedback amplifier to control the interpolation, in order to provide fine gain steps.

REFERENCES:
patent: 4430609 (1984-02-01), Van Kessel et al.
patent: 6441684 (2002-08-01), Nakamura
patent: 6445248 (2002-09-01), Gilbert
Phillips Semiconductor, “TDA9880T Alignment-free Multistandard Vision and FM sound IF-PLL Demodulator,” Product Specification, Nov. 22, 2000, pp. 1-40.
Gilbert, Barrie, “A Low-Noise Wideband Variable-Gain Amplifer Using an Interpolated Ladder Attenuator,” 1991 IEEE International Solid State Circuits Conference, ISSCC91/Session 17/Analog Techniques/Paper 17.5, pp. 280-281, 330.

Affiliated with

Also associated with

Rating

Fine step and large gain range programmable 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 Fine step and large gain range programmable gain amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fine step and large gain range programmable gain amplifier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3682814