Digital serial loop filter for high speed control systems

Details Digital serial loop filter for high speed control systems Digital serial loop filter for high speed control systems

1991-07-15

1994-09-27

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

36472401, 331 32, H03D 324

Patent

active

053512758

ABSTRACT:
A digital programmable loop filter for high frequency control systems applications utilizing a serial processing technique on pulse densities. The loop filter contains a proportional signal path and an integral signal path. A 4-time-slot sequencer time-multiplexes the serial proportional and integral signals to emulate a 1-pole/1-zero filter. An acquisition speed control circuit controls the acquisition time as well as step sizes of the scaler (proportional path) and the integrator (integral path) to provide loop variable programmability.

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AT&T Advance Data Sheet, "T7351 FDDI Physical Layer Device".

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