Circuit for generating a digital or analog signal as a function

Details Circuit for generating a digital or analog signal as a function Circuit for generating a digital or analog signal as a function

1975-03-20

1976-05-18

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 944

Patent

active

039582434

ABSTRACT:
A control circuit having a digital memory for providing sweep voltages to ceivers in a doppler satellite tracking station of proper amplitude and duration to ensure searching in the correct doppler frequency range. An internally generated ramp function voltage is combined with a reference voltage to produce a composite sweep signal for the receiver. The reference voltage level is determined either from a set of digi-switches or from a digital memory circuit which outputs a digital signal that is a function of the frequency of a received doppler signal.

REFERENCES:
patent: 3689921 (1972-09-01), Berry
patent: 3716859 (1973-02-01), Webb et al.
patent: 3810176 (1974-05-01), Gray
patent: 3836965 (1974-09-01), Preti

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