Phase changing circuit

Details Phase changing circuit Phase changing circuit

H - Electricity

03

K

328/134, 328/28

H03K 5/13 (2006.01) H03K 19/003 (2006.01) H03K 5/00 (2006.01)

Patent

CA 1250349

A PHASE CHANGING CIRCUIT ABSTRACT OF THE DISCLOSURE A phase changing circuit in a logic circuit in- cluding an ECL circuit which has a plurality of emitter output circuits. One emitter output circuit is used as the normal output. The other emitter output circuits are given additional capacitors. The emitter output circuits with the additional capacitors are connected to an emitter output portion of the separately provided control ECL circuits. An input control level of the control ECL circuit is changed so as to change the output level of the control ECL circuit. In accordance with whether the output level of the control ECL circuit is low or high, the capacitor is connected to the normal output of the ECL circuit. When the capacitor is con- nected to the normal output of the ECL circuit, the signal propagation from the input to the normal output is delayed by the capacitor.

487051

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