Differential high frequency level detector and data restoration

Details Differential high frequency level detector and data restoration Differential high frequency level detector and data restoration

1992-08-13

1995-07-25

Chin, Stephen

Pulse or digital communications

Receivers

Interference or noise reduction

375340, 375317, H04B 110

Patent

active

054369347

ABSTRACT:
An improved circuit topology for implementing level detection and data restoration operations on an input sinusoid. The differential high-frequency level detector and data restoration circuits of the present invention each include a differential input having a pair of circuit nodes for receiving a differential input signal. A slicing offset network is disposed to generate first and second differential signals in response to the differential input signal. The present invention further includes first and second comparators for respectively providing latch set and latch reset signals in response to the first and second offset differential signals. The data restoration circuit of the present invention further includes a latch operative to synthesize a recovered data waveform in accordance with pairs of set and reset signals. Similarly, the inventive level detector includes a latch which utilizes set and reset signals to generate a level detection signal.

REFERENCES:
patent: 4229831 (1980-10-01), Lacher
patent: 4908530 (1990-03-01), Huang
patent: 5222078 (1993-06-01), Cason et al.
patent: 5327465 (1994-07-01), Wincn et al.
Sedra and Smith, Microelectronic Circuits, 1987, pp. 231 & 885.

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