Tuned analog network

Details Tuned analog network Tuned analog network

1981-09-10

1983-11-22

Mullins, James B.

Amplifiers

Signal feedback

Phase shift means in loop path

330109, H03F 134

Patent

active

044172150

ABSTRACT:
A non-inverting, direct current amplifier stage is cascaded into an integrator stage to form a two stage tuned network (10) having a single input junction common to both stages. The network provides independent adjustment of center frequency, bandwidth and voltage gain. The insertion of a positive feedback loop between the stages provides a very narrow bandwidth network (10'). The addition of back-to-back zener diodes between the common input node and ground converts the network into an oscillator (10").

REFERENCES:
Wireless World Oct. 1977, vol. 83, No. 1502 "Low Noise RIAA Amplifier".
Active Filter Has Separate Band and Frequency Controls, John Jenkins, p. 132 NSWC/WOL/TR 75-170, FIG. 4.

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