Sample-and-hold device

Details Sample-and-hold device Sample-and-hold device

1990-05-24

1992-01-14

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307359, 328151, G11C 2702

Patent

active

050813722

ABSTRACT:
A sample-and-hold device provided with a series arrangement of a first and a second integrating circuit, each including an input, an output and a control signal input. The output of the first integrating circuit is coupled to the input of the second integrating circuit. A control unit supplies a first and a second control signal to the control signal inputs of the first and the second integrating circuit, respectively. The output of the second integrating circuit is fed back to the input of the first integrating circuit. The first integrating circuit is controlled by the first control signal in a manner such that in the first integrating circuit an integration step is performed upon the difference between the input voltage on the input of the first integrating circuit and the output voltage fed back from the output of the second integrating circuit. The second integrating circuit is controlled by the second control signal in a manner such that upon completion of the integration step in the first integrating circuit, an integration step is performed upon the output signal of the first integrating circuit.
This arrangement provides comparatively small signal variations at the inputs of the amplifier stages in the integrating circuits and thus reduces signal distortion.

REFERENCES:
patent: 4546324 (1985-10-01), Bingham et al.
patent: 4672239 (1987-06-01), Thommen
patent: 4691125 (1987-09-01), Rybicki
patent: 4728811 (1988-03-01), Iida et al.

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