Modulating device for a single-sideband modulation system

Details Modulating device for a single-sideband modulation system Modulating device for a single-sideband modulation system

1983-01-12

1985-04-16

LaRoche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 45, 332 48, 455109, H03C 160

Patent

active

045118647

ABSTRACT:
The modulating device reduces the number of electronic functions required for generating an SSB signal which is subjected to SSB peak-limiting in a transmitter which is selectively operable either on the upper channel or on the lower channel. By means of a mixer, the signal delivered by the peak-limiter is mixed with a signal whose frequency is double that of the local oscillator. By filtering the signal thus obtained by means of the filter which is symmetrical with the filter employed for carrying out SSB modulation, the signal to be transmitted on one of the channels is thus obtained. The signal to be transmitted on the other channel is obtained by reversing the position of the two filters.

REFERENCES:
patent: 2059719 (1936-11-01), Wilson et al.
patent: 2848687 (1958-08-01), Stanphill
patent: 2852749 (1958-09-01), Miedke
patent: 2903518 (1959-09-01), Kahn
patent: 3003036 (1961-10-01), Greefkes
patent: 3300720 (1967-01-01), Kowols
Weaver, Jr., D. K., "A Third Method of Generation and Detection of Single-Sideband Signals", Proceedings of the IRE, Dec. 1956, pp. 1703-1705.

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