Linear transconductance circuit having a large linear range

Details Linear transconductance circuit having a large linear range Linear transconductance circuit having a large linear range

1997-12-23

2000-04-04

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 65, 360 46, 330260, 327103, G11B 502

Patent

active

060468750

ABSTRACT:
A method for generating a response in a transconductance circuit includes receiving a circuit differential voltage input and providing a differential voltage input to each of a plurality of differential pairs to control, in part, a differential current generated by each differential pair. Each differential voltage input has a different common-mode voltage level. The method also includes sinking current through each of the differential pairs to control the differential current generated by each differential pair. The magnitude of the current sunk through one of the differential pairs is different from the magnitude of the current sunk through at least one of the other differential pairs. The method also includes combining the generated differential current from each of the plurality of differential pairs to produce a differential current output. Such a method may be used to generate a response in a transconductance circuit that is fairly linear over a range of input voltages without reducing the bandwidth of the transconductance circuit.

REFERENCES:
patent: 5606288 (1997-02-01), Prentice
patent: 5648738 (1997-07-01), Welland et al.
patent: 5821810 (1998-10-01), Swart et al.

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