BiCMOS logic circuit with a CML output

Details BiCMOS logic circuit with a CML output BiCMOS logic circuit with a CML output

1991-03-25

1992-05-12

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307475, 307455, H03K 1902, H03K 190175

Patent

active

051130955

ABSTRACT:
A logic circuit for receiving both CMOS- and CML-level input voltages in one embodiment performs a logical OR function. A reference bipolar transistor is coupled to a first power supply voltage terminal through a first resistor. A second bipolar transistor for receiving a CML-level input signal is coupled to the first power supply voltage terminal through a second resistor. Emitters of the bipolar transistors are connected together. A MOS transistor for receiving a CMOS-level input signal has a drain connected to a collector of the second bipolar transistor, and a voltage dropping portion seperate the source of the MOS transistor from the emitters of the reference transistor and the bipolar transistor. The input voltages control a constant current conducted from a current source connected to the source of the MOS transistor. The logic circuit base-to-emitter reverse bias caused by CMOS logic levels.

REFERENCES:
patent: 4546272 (1985-10-01), Suzuki et al.
patent: 4800303 (1989-01-01), Graham et al.
patent: 4918640 (1990-04-01), Heimsch et al.
patent: 4939478 (1990-07-01), Heimsch et al.
patent: 5001370 (1991-03-01), Phan et al.
"Hot-Carrier Degradation in Bipolar Transistors at 300 and 110K--Effect on BiCMOS Inverter Performance", IEEE Transactions on Electron Devices, vol. 37, No. 4, Apr. 1990, pp. 1171-1173.
Motorola MECL System Design Handbook, No. HB205R1, pp. 10-11.

Affiliated with

Also associated with

Rating

BiCMOS logic circuit with a CML output does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with BiCMOS logic circuit with a CML output, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and BiCMOS logic circuit with a CML output will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2426804