Compensation circuit for improving modulation characteristic, an

Details Compensation circuit for improving modulation characteristic, an Compensation circuit for improving modulation characteristic, an

1995-05-16

1996-11-19

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Testing or calibrating of radar system

By monitoring

342203, 342204, G01S 740

Patent

active

055767133

ABSTRACT:
A differential gain characteristic can be equivalently improved by providing a compensation circuit. The compensation circuit compensates a differential gain of a voltage-controlled oscillator, of which oscillating frequency is controlled by a control voltage. The compensation circuit comprises a first resistor which is connected to an input side of the voltage-controlled oscillator in series and a series circuit of a second resistor and a first diode, which is connected to the input side of the voltage-controlled oscillator in parallel, and further a first bias electric source for giving a bias voltage to the first diode in a forward direction. It becomes possible to make DG to be less than 5%, even if a modulator having a larger slope of characteristic, such as DG<50%.

REFERENCES:
patent: 3905034 (1975-09-01), Jensen et al.
patent: 3952302 (1976-04-01), Mullins
patent: 4083049 (1978-04-01), Mattern et al.
patent: 4123726 (1978-10-01), Schucht
patent: 4171514 (1979-10-01), Faxon

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