High frequency ECL voltage controlled ring oscillator

Details High frequency ECL voltage controlled ring oscillator High frequency ECL voltage controlled ring oscillator

1989-01-23

1989-10-24

LaRoche, Eugene R.

Oscillators

Ring oscillators

331108B, H03B 100

Patent

active

048765198

ABSTRACT:
An emitter-coupled logic (ECL) gate configuration is provided that allows variations in the bias current for controlling propagation delay. The emitter coupled logic circuitry includes a plurality of input transistors having commonly-coupled emitters. The collector of each input transistor is connected to receive a control voltage. A current source is connected between the commonly-coupled emitters and ground. Circuitry, preferably a variable resistance, is connected between the collectors of the input transistors and a supply voltage. A bias voltage controls the charging current provided to the collectors of the ECL input transistors.

REFERENCES:
patent: 4565976 (1986-01-01), Campbell

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