Voltage subtractor for serial-parallel analog-to-digital convert

Details Voltage subtractor for serial-parallel analog-to-digital convert Voltage subtractor for serial-parallel analog-to-digital convert

1977-01-31

1978-11-07

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

307350, 328158, 330257, H03F 345

Patent

active

041248244

ABSTRACT:
A high-speed voltage subtractor circuit suitable for use in a serial-parallel A/D converter uses differential current switches to select a predetermined reference voltage value as one input to a precision current matching circuit whose other input is an applied analog input signal. An output buffer circuit coupled to the current matching circuit produces an output signal equal to the difference between the analog input signal and the reference voltage value.

REFERENCES:
patent: 3783307 (1974-01-01), Breuer
patent: 4032801 (1977-06-01), Fulkerson

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