Browse Prior Art Database

Transient Compensator

IP.com Disclosure Number: IPCOM000097491D
Original Publication Date: 1962-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Shen, MN: AUTHOR

Abstract

Compensation for transients is provided in this amplifying and gating circuit by connecting a resistor between its two portions.

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Transient Compensator

Compensation for transients is provided in this amplifying and gating circuit by connecting a resistor between its two portions.

Transistor T1 is connected in common base configuration between input terminal A and output terminal D. A cascode gate is formed by the transistors T2 and T3, connected to the B and C input terminals, respectively.

In the normal Mode I of operation of this circuit, T1 amplifies signals supplied at terminal A to provide a signal at D whose amplitude swings about a particular reference level Vref. At this time, the signals at terminals B and C are both at Vref and T2 and T3 are biased to a non-conducting state.

In Mode II of the circuit's operation, there is no signal supplied at terminal A. Signals are supplied at terminals B and C raising the level at the T3 base. T3 acts as a sink for the current flowing from the +V supply through T2. Concurrently, current is also conducted through T1 to the -V sink. The square wave supplied at terminal B conditions T2 for periodic conduction providing a square wave signal at D. This signal is referenced about Vref in the same manner as occurs in Mode I.

However, the signal at D is accompanied by transients which delay the response of the circuitry coupled to the terminal D. In order to eliminate the transients, the resistor R is connected between the input terminal C and the emitter of T1. By properly selecting the value of R, the bias at the emitter-base junction of T1 is contro...