Electronic digital logic circuitry – Interface – Current driving
Reexamination Certificate
2004-02-04
2008-08-12
Barnie, Rexford (Department: 2819)
Electronic digital logic circuitry
Interface
Current driving
C326S068000, C327S051000, C327S052000, C365S189200
Reexamination Certificate
active
07411420
ABSTRACT:
An input integrating circuit and a differential amplifier circuit are provided in a receiver circuit which samples a pair of differential input signals, detects the levels of said pair of input signals, and latches the detected levels. The above-mentioned input integrating circuit further includes: a pair of input transistors receiving the pair of input signals at respective gates thereof; a switch transistor becoming conducting in response to a sampling clock in a sampling period so as to supply a discharge current to a common source terminal of the pair of input transistors; and a precharge circuit precharging drain terminals of the pair of input transistors in a precharge period. The input integrating circuit discharges the capacitor of the drain terminals by the discharge current in the sampling period succeeding the precharge period. The differential amplifier circuit amplifies the drain terminals of the input integrating circuit.
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Arent & Fox LLP
Barnie Rexford
Fujitsu Limited
White Dylan
LandOfFree
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