Frequency characteristic-adjusting apparatus

Details Frequency characteristic-adjusting apparatus Frequency characteristic-adjusting apparatus

1979-11-01

1981-11-17

Mullins, James B.

Amplifiers

With plural amplifier channels

Amplifying different frequencies in different channels

330295, 330305, 330306, H03F 368

Patent

active

043014208

ABSTRACT:
A frequency characteristic-adjusting apparatus comprising a filter circuit formed of a first variable gain amplifier and a capacitor, a second variable gain amplifier for amplifying an output signal from the filter circuit, an amplifier for amplifying a signal denoting a difference between the amplitudes of an input signal to the filter circuit and an output signal therefrom, and an adder circuit for adding together output signals from the second variable gain amplifier and difference signal amplifier, and wherein the first and second gain amplifiers are connected to potentiometers, and the gains of the first and second variable gain amplifiers are varied in accordance with changes in the voltage supplied from the potentiometers to the amplifiers, while maintaining the prescribed relationship between the gains of the first and second variable gain amplifiers.

REFERENCES:
patent: 2760011 (1956-08-01), Berry
patent: 3769611 (1973-10-01), Scaggs
patent: 4032857 (1977-06-01), Lum
patent: 4137510 (1979-01-01), Iwahara
Philips Data Sheet, TCA 740A, Oct. 1978.

Affiliated with

Also associated with

Rating

Frequency characteristic-adjusting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency characteristic-adjusting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency characteristic-adjusting apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1294629