Load circuit for a differential driver

Details Load circuit for a differential driver Load circuit for a differential driver

1990-02-20

1991-04-30

Scott, J. R.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Including means for using, or compensating for, the induced...

H01H 4700

Patent

active

050123840

ABSTRACT:
There is disclosed an improved output circuit for use with a differential line driver which drives a parallel inductance and resistance load coupled across the line driver output. The output circuit substantially reduces the kickback voltage produced across the load which results from a residual magnetizing current being stored in the load inductance. The output circuit includes an impedance means which is coupled across the output terminals and a common mode current source coupled between the impedance means and a common potential for sinking a portion of the residual magnetizing current to reduce the amount of residual magnetizing current flowing through the load resistance.

REFERENCES:
patent: 4795920 (1989-01-01), Hechtman et al.
patent: 4910635 (1990-03-01), Gilliland

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