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US 4,382,198 AGranted
Amplitude limiter circuit
AssigneeTektronix, Inc.
InventorsYasumori Ishijima, Rikichi Murooka
Life of this patent
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Abstract
An amplitude limiter circuit is provided in which the output terminal is disconnected from the input terminal, or the input signal source, when the input signal amplitude exceeds the predetermined upper and/or lower limit. Voltage maintenance means maintains the output voltage when the amplitude limiting condition is reached.
Claims10
An amplitude limiter circuit, comprising:
- an input terminal for receiving an input voltage signal and an output terminal;
- switch means connected between said input and output terminals;
- control means for maintaining said switch means conducting when said input signal remains within a predetermined limit and non-conducting when said signal exceeds said predetermined limit;
- and
- voltage maintenance means responsive to said control means for maintaining the voltage on said output terminal at said predetermined limit when said switch means is non-conducting.
2 more elements
An amplitude limiter circuit, comprising:
- an input terminal and an output terminal;
- a diode bridge circuit connected between said input and output terminals, said diode bridge circuit having two control terminals;
- a pair of current source means each connected respectively to one of said two control terminals;
- and
- first and second transistors, each having an emitter connected to a respective one of said control terminals and a collector connected to the current source means which is connected to the other of said control terminals, the bases of said first and second transistors coupled respectively to first and second predetermined voltages.
2 more elements
Dependencies are inferred from the claim text.