Variable equalizer

Details Variable equalizer Variable equalizer

1979-05-08

1981-04-14

Dixon, Harold A.

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

333 28R, H03F 304, H03H 500

Patent

active

042622638

ABSTRACT:
A variable equalizer for compensating for the frequency characteristics of transmission media, comprising a plurality of variable circuits which are connected in cascade to an input terminal and which have the same variation characteristics, coefficient circuits which receive input and output signals of the variable circuits as inputs thereof and which multiply the inputs by coefficients, a plurality of impedance circuits which receive as inputs thereof signals with outputs of the coefficient circuits selectively combined and which have frequency-dependencies, and an adder circuit which adds outputs of the impedance circuits to provide an equalized signal as its output. No feedback circuit is required in the construction, and the plurality of variable circuits are constructed of the same circuits. Therefore, a variable equalizer which is capable of high-speed operation, whose circuit arrangement is simple and whose compensation accuracy is high is realized.

REFERENCES:
patent: 4004253 (1977-01-01), Takasaki et al.
patent: 4080580 (1978-03-01), Takasaki et al.

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