Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Particular stable state circuit
Reexamination Certificate
2007-10-09
2007-10-09
Le, Don (Department: 2819)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Particular stable state circuit
C327S199000, C326S083000
Reexamination Certificate
active
11326288
ABSTRACT:
To maintain the noise removal characteristic of a Schmidt trigger circuit stably. There are provided a Schmidt trigger circuit10constituted from a Vp/Vn setting unit11for determining the threshold level of an input signal and an RS latch unit12, a driver unit13having a low-pass filter function of passing a pulse signal with a predetermined width or more, output from the Schmidt trigger circuit10, and an operating current setting and sensor unit14for changing a supply voltage and supplying the changed supply voltage to an inverter INV4having the low-pass filter function so that the inverter INV4changes the width of a pulse to be passed through. The operating current setting and sensor unit14includes a sensor circuit16having a P-ch transistor MP2and an N-ch transistor MN2that are connected in series for setting the supply voltage. The inverter INV4is constituted from a P-ch transistor MP1that has the same shape as the P-ch transistor MP2and an N-ch transistor MN1that has the same shape as the N-ch transistor MN2.
REFERENCES:
patent: 6084456 (2000-07-01), Seol
patent: 6433615 (2002-08-01), Nagano et al.
patent: 2-105715 (1990-04-01), None
patent: 10-163826 (1998-06-01), None
Foley & Lardner LLP
Le Don
NEC Electronics Corporation
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