Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2007-05-29
2007-05-29
Ton, My-Trang Nu (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S071000
Reexamination Certificate
active
11601017
ABSTRACT:
Circuitry and methods allow signal detection based entirely on differential voltage pairs. An incoming differential data signal is processed by separate full-wave rectifiers to extract high and low peak voltage envelopes. The rectifiers utilize negative feedback to ensure accurate envelope detection, and can detect peaks regardless of incoming signal polarity. The extracted envelopes are compared to a differential pair of threshold voltages. If the envelope signals have a smaller voltage difference than that of the threshold signals, the final output of the detector indicates that a loss-of-signal condition has occurred. Fully differential operation makes the detector independent of common-mode voltage, and thus more robust.
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patent: 6965257 (2005-11-01), Tanaka
patent: 6977531 (2005-12-01), Chien
patent: 7116948 (2006-10-01), Chien
Baig Mashkoor
Bereza Bill
Kwasniewski Tad
Mei Haitao
Wang Shoujun
Altera Corporation
Fish & Neave IP Group Ropes & Gray LLP
Jackson Robert R.
La Chai-Hao
Nu Ton My-Trang
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