Single sideband modulator for translating baseband signals to ra

Details Single sideband modulator for translating baseband signals to ra Single sideband modulator for translating baseband signals to ra

1991-11-18

1992-11-10

Pascal, Robert J.

Modulators

Amplitude modulator

Single or vestigial sideband type

375 61, 455109, H03C 100

Patent

active

051627639

ABSTRACT:
A single sideband modulator provides a means of translating low frequency baseband signals directly to radio frequency in a single stage. Such modulators, providing suppressed carrier and one or two of the sidebands, facilitates the transmission of intelligence with significantly increased gain over AM transmission. Control signals are continuously generated to keep the local oscillator breakthrough and image sidebands down to an insignificantly low level. This is achieved by monitoring amplitude of the RF output of the single sideband modulator, and comparing this with the baseband signals. By adjusting the d.c. offsets at the baseband inputs to the balanced modulators, carrier breakthrough is cancelled. By adjusting the relative phases of the baseband signals, deviations from the 90.degree. split are compensated. By changing the amplitude of one of the baseband signals, the level of one of the RF paths is adjusted to achieve amplitude balance.

REFERENCES:
patent: 4974236 (1990-11-01), Gurcan et al.
patent: 4994769 (1991-02-01), Kishi

Affiliated with

Also associated with

Rating

Single sideband modulator for translating baseband signals to ra does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single sideband modulator for translating baseband signals to ra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single sideband modulator for translating baseband signals to ra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2296733