Amplifiers – Modulator-demodulator-type amplifier
Patent
1993-06-30
1994-05-03
Mottola, Steven
Amplifiers
Modulator-demodulator-type amplifier
455108, H03F 338
Patent
active
053091140
ABSTRACT:
A pulse step modulator (PSM) is disclosed herein and having particular use in AM radio broadcasting. This modulator includes a plurality of series connected unit step voltage modules each including a DC voltage source and an associated actuatable switch for, when actuated, turning on the associated module to provide a unit step voltage of a given magnitude. An output circuit is connected to the modules for providing an output voltage to a load wherein the magnitude of the output voltage is a multiple of a unit step voltage in dependence upon the number of modules that are turned on. Each module exhibits the characteristic of dissipating heat when the module is turned on with the amount of heat dissipated being a function of the time duration that the module is turned on. Thermal loading of the modules is equalized by thermally coupling selected ones of the modules together as a group with the modules of each group being selected such that the average amount of heat being dissipated by each group is essentially equalized.
REFERENCES:
patent: 4403197 (1983-09-01), Swanson
patent: 4560944 (1985-12-01), Furrer
patent: 4725788 (1988-02-01), Lodahl
patent: 4745368 (1988-05-01), Lodahl
Harris Corporation
Mottola Steven
LandOfFree
Pulse step modulator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pulse step modulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse step modulator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2117578