Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By pulse coincidence
Reexamination Certificate
2005-04-26
2005-04-26
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By pulse coincidence
C327S024000
Reexamination Certificate
active
06885221
ABSTRACT:
In a differential output signal circuit suitable for restraining voltage overshooting/undershooting at differential output terminals due to lags in input signals and realizing stable and fast switching of differential input signals, a first differential pair of PMOS. transistors connected to a first current source and a second differential pair of NMOS transistors connected to a second current source are mutually connected at the differential output terminals, and a capacitor is connected between the connection nodes of the respective differential pairs and current sources. A transitional current path of the capacitor restrains voltage variations during differential input signal switching. Further in a signal detection apparatus suitable for realizing the detection of fast transmitted differential input signals with less current consumption and at low cost, an edge detect signal is supplied against a differential input of or above a prescribed value, and a setting signal is issued when this edge detect signal has been detected a prescribed number of times during a first prescribed length of time while a resetting signal is issued if none is detected during a second prescribed length of time. A signal-detect signal is generated from these setting signal and resetting signal.
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Haraguchi Hiroko
Watanabe Hideaki
Fujitsu Limited
Staas & Halsey , LLP
Wells Kenneth B.
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