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US 4,730,167 AGranted
Power supply arrangement
AssigneeLicentia Patent-Verwaltungs-G.m.b.H.
InventorsHorst Beeken, Hans-Heinrich Vitters
Life of this patent
Estimating the term…
Abstract
A power supply arrangement for amplifying a modulated voltage signal. A switch control device is programed with a switching schedule for switching a plurality of individual power supply units in dependence on the magnitude of the modulated voltage signals to result in an essentially uniform electrical load on the power transformer, with the internal resistance of the transformer being essentially independent of the number of switched-on individual power supply units.
Claims12
A power supply arrangement for amplifying a modulated voltage signal comprising:
- a power transformer composed of a primary winding, and a plurality of individual power supply units each having a secondary winding arranged in operative relationship with said primary winding, and including means connected to said secondary winding for generating a direct voltage from a voltage induced across said secondary winding in response to an alternating voltage impressed across said primary winding, each individual power supply unit further including a controllable switch for switching said individual power supply unit on and off independently of the other individual power supply units so that the direct voltage from selected individual power supply units can be additively combined to form an amplified modulated voltage signal;
- and
- switch control means coupled to the modulated voltage signal and having a plurality of outputs each connected to a respective one of said controllable switches, said switch control means including a permanently programmed control means which stores a program comprising a switching schedule for selectively controlling the controllable switches in dependence of the momentary value of the amplitude of the modulated voltage signal and in a manner which combines said individual power supply units into an annular arrangement to form a switching ring in which adjacent individual power supply units are combined solely in dependence of their electrical characteristics so that, during switching of identically sized sectors in the switching ring, voltage jumps are produced which are essentially of the same magnitude and said individual power supply units have essentially the same internal resistances, said switching schedule causing additional individual power supply units to be switched in consecutively at the beginning of a sector in response to an increase in the momentary value of magnitude of the modulated voltage signal and causing individual power supply units to be consecutively switched off at the end of a sector in response to a reduction in the momentary value of the magnitude of the modulated voltage signal.
A power supply arrangement for amplifying a modulated voltage signal comprising:
- a power transformer composed of a primary winding and a plurality of individual power supply units each having a secondary winding arranged in operative relationship with said primary winding, and including means connected to said secondary winding for generating a direct voltage from a voltage induced across said secondary winding in response to an alternating voltage impressed across said primary winding, each individual power supply unit further including a controllable switch for switching said individual power supply unit on and off independently of the other individual power supply units so that the direct voltage from selected individual power supply units can be additively combined to form an amplified modulated voltage signal;
- and
- switch control means coupled to the modulated voltage signal and having a plurality of outputs each connected to a respective one of said controllable switches, said switch control means including a permanently programmed control means which stores a program comprising a switching schedule for selectively controlling the controllable switches in dependence of the momentary value of the amplitude of the modulated voltage signal and in a manner which takes into consideration the electrical characteristics of said individual power supply units to maintain a uniform load on said transformer and to provide a substantially constant internal resistance for said transformer, independent of the number of said power supply units switched on.
Dependencies are inferred from the claim text.