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Output Noise Compensation Circuit

IP.com Disclosure Number: IPCOM000042620D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04

Publishing Venue

IBM

Related People

Authors:
Stoops, EH [+details]

Abstract

The figure shows an FET off-chip driver (OCD) circuit. The invention is the inverter circuit 15 comprising the three devices 13, 13D and 14. FET device 13 is a natural threshold device, FET device 13D is a depletion-mode FET device, and FET device 14 is an enhancement-mode FET device. The gates of the load FET devices 13 and 13D are connected in common. A positive signal at the input passes through the pair of cascade-connected inverters formed by devices 19, 20, 9 and 10 and is applied as a positive signal to the gates of devices 13 and 13D. The positive signal at the input passes through the pair of push-pull connected inverters 1, 2, 5 and 6 and is applied as a negative signal to the gate of device 14.