Input circuit for a measuring amplifier device

Details Input circuit for a measuring amplifier device Input circuit for a measuring amplifier device

1978-05-25

1980-04-15

Mullins, James B.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324123C, 330110, 330148, G06G 712, G01R 130

Patent

active

041986075

ABSTRACT:
A measuring amplifier device is provided with an input circuit producing different functions of an input signal in order to permit output signals in different measuring ranges to be produced. The circuit can be constituted by an operational amplifier having a feedback connection composed of a series arrangement of several elements each defining a particular measuring range together with subtraction stages forming signals corresponding to each range, or by a plurality of diodes or diode-resistor networks connected to divide the input signal between them and each defining a different measuring scale.

REFERENCES:
patent: 3268813 (1966-08-01), Pendleton
patent: 3360723 (1967-12-01), Royce
patent: 3371224 (1968-02-01), Polo
patent: 3543168 (1970-11-01), Weill
patent: 3614444 (1971-10-01), Nirschl
patent: 3807816 (1974-04-01), Hamburg
patent: 3930202 (1975-12-01), Dever
patent: 3997845 (1976-12-01), Wegstedt
patent: 4011504 (1977-03-01), DePillo
patent: 4030039 (1977-06-01), Fahlgren
patent: 4085374 (1978-04-01), Nagahama

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