Switched impedance emitter coupled logic gate

Details Switched impedance emitter coupled logic gate Switched impedance emitter coupled logic gate

1986-06-05

1987-12-15

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307467, 307446, 307570, 307296R, H03K 301, H03K 1760, H03K 19086, H03K 1902

Patent

active

047135603

ABSTRACT:
There is disclosed herein an ECL gate using switchable load impedance means to allow the gate to be placed in a low power-consumption mode while preserving the logic state existing at the outputs of the gate at the time it is switched into the low-power mode. N-channel or P-channel MOS transistors are used as the switchable load impedances. The gates of these transistors are coupled to a MODE control signal which causes the MOS transistors to switch between high-impedance and low-impedance states. Another MOS transistor having its gate coupled to the same MODE control signal is used as the current source for the bias current to the conventional ECL current mirror. When low-power mode operation is desired, all the MOS transistors are switched to their high-impedance states. This reduces the bias current flowing through the ECL gate, thereby reducing its power consumption. The logic states at the output nodes are preserved by virtue of the load impedance of the ECL switching transistors having increased simultaneously with their collector currents having decreased.

REFERENCES:
patent: 3569746 (1971-03-01), Grenoble et al.
patent: 4551638 (1985-11-01), Varadarajan
patent: 4585957 (1986-04-01), Ooms

Affiliated with

Also associated with

Rating

Switched impedance emitter coupled logic gate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switched impedance emitter coupled logic gate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched impedance emitter coupled logic gate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1221977