Multi-stage high-gain high-speed amplifier

Amplifiers – With periodic switching input-output

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

330 51, 330253, 330258, 330311, H03F 345

Patent

active

058476008

ABSTRACT:
A two-stage switched-capacitor residue amplifier having novel circuitry in the first and second stages provides fast and accurate settling while configured with a large closed-loop gain, and also provides low power consumption while powered from a five volt supply. The invention is particularly well suited for use in a multi-stage, pipe-lined analog-to-digital converter (ADC) that converts multiple bits in the first pipeline stage. Complementary PMOS and NMOS differential pairs are used in the first and/or second stage to increase the current slew capability of the amplifier. Current mirror gain and/or positive feedback is used in the second stage to increase transonductance and bandwidth. Cascode transistors are used in the output of the first and/or second stages and active cascode gain enhancement is used in the first stage to increase dc gain and accuracy. The common mode level at the output of the second stage is controlled by injecting a pair of control currents (representative of the difference between a common-mode level actually at the output of the second stage and a desired common mode level) into a pair of mirror input nodes in the second stage. The common mode level of the first stage is controlled from a common node of a differential pair of the second stage. The two-stage amplifier of the invention provides a gain bandwidth product of 800 MHz, a closed-loop bandwidth of 50 MHz, a dc gain 90 dB, and a power consumption 80 mW.

REFERENCES:
patent: 5084639 (1992-01-01), Ribner
patent: 5442318 (1995-08-01), Badyal et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Multi-stage high-gain high-speed 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 Multi-stage high-gain high-speed amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-stage high-gain high-speed amplifier will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-181912

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.