Signal detection circuit and signal detection method

Details Signal detection circuit and signal detection method Signal detection circuit and signal detection method

2008-04-15

2008-04-15

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By presence or absence pulse detection

C327S065000

Reexamination Certificate

active

10948568

ABSTRACT:
It is intended to provide a signal detection circuit and a signal detection method capable of preventing influences of variations in transistor characteristics, occurrence of yield degradations of the signal detection circuit and capable of detecting differential input signals at high speed. The signal detection circuit4comprises an amplifier section1, a comparator section2, and an output section3. Differential input signals and differential reference voltages are differential-amplified by differential amplifiers10, 11of identical circuit structure provided in the amplifier section1. The relationship of degree between differential input signals and differential reference voltages after differential amplification are compared in comparators12and13of the comparator section2. High level comparison result signals CPH are output from the comparator12through node N6during period in which at least one of amplified data plus signals GDP and amplified data minus signals GDM is higher than amplified high reference voltages GRH. In an integration circuit21, integration of comparison signals COMP is performed for performing noise eliminating operations and for outputting detection signals HS_ENV_OUT.

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Behzad Razavi, “Design of Analog CMOS Integrated Circuits,” ISBN 4-621-07220-X C 3055, Mar. 30, 2003, pages: cover, title, 20, 156, 157.

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