Electrical filters

Details Electrical filters Electrical filters

1974-10-18

1976-01-13

Mullins, James B.

Telegraphy

Systems

Printing

178DIG12, 330126, 333 70R, H04B 104

Patent

active

039328198

ABSTRACT:
A filter performs a dual filtering function by connecting an input terminal through a first impedance such as a resistor to a first output terminal. The input terminal is connected to a virtual earth at the input to a current amplifier through the first impedance and a second impedance such as a tuned circuit. The output of the amplifier is connected to a second output terminal and also to ground through a third impedance such as a resistor. The characteristics at the first and second output terminals may be complementary band stop and band pass characteristics.

REFERENCES:
patent: 2217839 (1940-10-01), Grundman
patent: 3325753 (1967-06-01), Shearer et al.
patent: 3531652 (1970-09-01), Aemmer et al.

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