Master-slice type ECL circuit

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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Details

307475, 307455, H03K 19086, H03K 19173

Patent

active

052372200

ABSTRACT:
A master-slice type emitter coupled logic circuit includes a first and a second inverter circuit and a two-input AND circuit which receives output signals from the first and second inverter circuits. Each of the first and second inverter circuits has an emitter follower circuit having a level shift circuit and an emitter follower transistor whose collector is connected to a higher potential power source, whose base receives a logic signal, and whose emitter is coupled to a lower potential power source. The emitter of the emitter follower transistor in the first inverter circuit is coupled to the lower potential power source through only a load resistor, whereas that in the second inverter circuit is coupled to the lower potential power source through the level shift circuit and the load resistor. The level shift circuit is formed by at least one diode whose anode is to be connected with the emitter of the emitter follower transistor and whose cathode is to be connected with one end of the load resistor. The outputs of the first and second inverter circuits are directly inputted to the two-input AND circuit. According to this arrangement, such an input emitter follower circuit for level shifting as was present in a conventional multi-input AND circuit can be omitted, resulting in the saving of power consumption more than 20%.

REFERENCES:
patent: 4506173 (1985-03-01), Yum
patent: 4514650 (1985-04-01), Yum
patent: 4633104 (1986-12-01), Mallinson
patent: 5029280 (1991-07-01), Yee et al.

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