Compensation for ground voltage variation on a communication bus

Details Compensation for ground voltage variation on a communication bus Compensation for ground voltage variation on a communication bus

1994-06-20

1996-04-30

Chin, Stephen

Pulse or digital communications

Cable systems and components

307 31, 375295, H04B 300, H04L 2500

Patent

active

055132189

ABSTRACT:
A serial communication bus for a motor vehicle subject to different ground voltages on the common line and a transmitting module has a compensation circuit to prevent mismatches which distort pulse current waveforms and cause radiated emissions. When line ground voltage is higher than the transmitter voltage an integrator is used to simulate the line ground voltage and apply that to the transmitter ground. The integrator has a small current source and a very large current sink to follow the line ground potential. The transmitter output is disabled between pulses to avoid increasing the line ground voltage. When line ground voltage is lower than the transmitter voltage, the transmitter is enabled between pulses to feed current to the line to increase its potential.

REFERENCES:
patent: 4774692 (1988-09-01), Oishi et al.
patent: 4890015 (1989-12-01), Wise
patent: 5432817 (1995-06-01), Hormel et al.

Affiliated with

Also associated with

Rating

Compensation for ground voltage variation on a communication bus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compensation for ground voltage variation on a communication bus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensation for ground voltage variation on a communication bus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-635066