High frequency ecl voltage controlled ring oscillator

Details High frequency ecl voltage controlled ring oscillator High frequency ecl voltage controlled ring oscillator

H - Electricity

03

K

328/128

H03K 3/03 (2006.01) H03K 5/13 (2006.01) H03K 19/086 (2006.01) H03L 7/099 (2006.01) H03K 5/00 (2006.01)

Patent

CA 1303690

-?- ABSTRACT HIGH FREQUENCY ECL VOLTAGE CONTROLLED RING OSCILLATOR 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.

614696

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