Initial potential setting circuit for a sample/hold circuit asso

Details Initial potential setting circuit for a sample/hold circuit asso Initial potential setting circuit for a sample/hold circuit asso

1989-08-08

1990-11-27

Shoop, Jr., William M.

Coded data generation or conversion

Sample and hold

341124, 341161, 307353, H03M 100

Patent

active

049739751

ABSTRACT:
One of analog input voltages applied to a plurality of analog input terminals is selected by means of analog switches connected to the respective analog input terminals and supplied to a common terminal. In this case, each of the analog switches permits selective supply of the potential of a corresponding one of the plurality of analog input terminals in response to a control signal supplied from a controller. The common terminal is connected to the positive input terminal of a comparator. The comparator compares the voltage with a digital output value from the controller which is converted into an analog voltage by means of a D/A converter. Further, the controller generates a preset control signal in an inhibition period during which supply of a voltage from the plurality of analog input terminals to the common terminal is inhibited. An initial potential setting circuit sets the potential of the common terminal to a voltage level equal to substantially one-half the maximum voltage level of the analog input voltages applied to the plurality of analog input terminals.

REFERENCES:
patent: 3430225 (1969-02-01), Avignon
patent: 3846787 (1974-11-01), Myers et al.
patent: 4618848 (1986-10-01), Parfitt
patent: 4700022 (1987-10-01), Salvador et al.

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