Signal processing circuit with voltage clamped input
AssigneeMotorola, Inc.
InventorGary L. Pace
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Abstract
A signal processing circuit with enhanced response time includes a data limiter circuit having an input and an input capacitor having one terminal coupled to the input. A first selectively actuable voltage clamping circuit responds to a first comparing circuit and is coupled to the input for preventing the voltage at the input from exceeding a predetermined upper voltage. A second selectively actuable voltage clamping circuit is responsive to a second comparing circuit and is coupled to the input for preventing the voltage at the input from decreasing below a predetermined lower voltage.
Claims15
A signal processing arrangement having an input and a reference voltage, said signal processing arrangement for use with a signal, said signal being capacitively coupled to said input, said signal processing arrangement comprising in combination:
- first voltage comparing means for comparing an input signal at said input with said reference voltage and for providing a first output signal when said input signal exceeds said reference voltage by a first predetermined voltage;
- first voltage clamping means, coupled to said input, for preventing said input signal from exceeding said reference voltage by more than said first predetermined voltage;
- second voltage comparing means for comparing said input signal with said reference voltage and provding a second output signal when said input signal decreases below said reference voltage by a second predetermined voltage;
- and
- second voltage clamping means, coupled to said input, for preventing said input voltage from decreasing below said reference voltage by more than said second predetermined voltage.
Dependencies are inferred from the claim text.