Efficient power supply for rapidly changing power requirements
First Claim
1. An electronic power supply circuit, particularly suitable for supplying power to an ultra high or microwave radio frequency power amplifier with a high frequency varying power demand, said power supply circuit having a supply output arranged for connecting to an input of said ultra high or microwave radio frequency power amplifier, said power supply circuit comprising:
- a variable voltage supply circuit having a voltage output and a control input, said voltage supply circuit comprising a voltage divider series circuit of two controllable current limiting electronic linear devices connected across a voltage source input, each of said devices having a device control input in communication with said voltage supply control input via a control circuit, said linear devices and control circuit being arranged to operate at a control rate substantially corresponding to said high frequency, said control input being applied to said linear devices for controlling a voltage at a point of said series circuit located between said two linear devices, said point being connected to said supply output; and
a switched mode type variable current supply of low electrical power dissipation connected to said supply output, wherein the switched mode type variable current supply is arranged to maximize an efficiency of the electronic power supply circuit, and to deliver a current appearing as a substantially constant current when plotted at a scale for observing a signal of a frequency corresponding to said ultra high or microwave radio frequency or at a scale for observing a signal of a frequency corresponding to said high frequency variation.
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Accused Products
Abstract
A highly efficient power supply, a method for supplying power, and a method for arranging a power supply, for a UHF or microwave radio frequency amplifier intended for operation with a signal that has a power level which varies at a high frequency rate. The power supply has an output for connecting to a power supply input of the radio frequency power amplifier and includes a high rate controllable voltage supply employing electronic linear devices connected to the output, an element for quantifying power dissipated by the electronic linear devices and a low rate controllable current supply connected to the output. Preferably, the current supply is a substantially constant current supply at the frequency of the radio frequency signal. Preferably, the controllable voltage supply has a control input and is arranged to be controlled for outputting a voltage that is a function of the high frequency power variation.
56 Citations
28 Claims
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1. An electronic power supply circuit, particularly suitable for supplying power to an ultra high or microwave radio frequency power amplifier with a high frequency varying power demand, said power supply circuit having a supply output arranged for connecting to an input of said ultra high or microwave radio frequency power amplifier, said power supply circuit comprising:
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a variable voltage supply circuit having a voltage output and a control input, said voltage supply circuit comprising a voltage divider series circuit of two controllable current limiting electronic linear devices connected across a voltage source input, each of said devices having a device control input in communication with said voltage supply control input via a control circuit, said linear devices and control circuit being arranged to operate at a control rate substantially corresponding to said high frequency, said control input being applied to said linear devices for controlling a voltage at a point of said series circuit located between said two linear devices, said point being connected to said supply output; and a switched mode type variable current supply of low electrical power dissipation connected to said supply output, wherein the switched mode type variable current supply is arranged to maximize an efficiency of the electronic power supply circuit, and to deliver a current appearing as a substantially constant current when plotted at a scale for observing a signal of a frequency corresponding to said ultra high or microwave radio frequency or at a scale for observing a signal of a frequency corresponding to said high frequency variation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for supplying electrical power to an ultra high or microwave radio frequency power amplifier amplifying a ultra high or microwave radio frequency signal having a power demand varying at high frequency rate, using a power supply having an output connected to a amplifier power supply input of said ultra high or microwave radio frequency power amplifier, said method comprising:
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delivering to said output a voltage by a variable voltage supply having a voltage output and a control input and including a series circuit of at least two current limiting electronic linear devices of a conductivity arranged to be controlled at a rate corresponding to at least the high frequency rate of said high frequency power demand variation, which series circuit is arranged to be connected to a substantially constant voltage source of electrical power, which voltage output is at a point of said series circuit located between two of said at least two electronic linear devices, which control input is arranged to be connected to a control means for controlling a voltage at said voltage output in accordance with said power variation; and delivering to said output, by a variable switched mode current supply of low electrical power dissipation being arranged to maximize the efficiency of the electronic power supply circuit and connected to said output, a current appearing as a substantially constant current when plotted at a scale for observing the radio frequency of said ultra high or microwave radio frequency signal or a scale for observing the high frequency rate power variation. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification