Method and arrangement for controlling the operation of a high-frequency power amplifier
First Claim
1. A method for controlling operation of a high-frequency power amplifier, comprising the steps of:
- (a) inputting a signal to be amplified to a high-frequency power amplifier via a forward line;
(b) generating a sample signal from said forward line on an output side of said high-frequency power amplifier, to a feedback line;
(c) detecting the sample signal at a first point in said feedback line, using a detector having a dynamic range;
(d) controlling said high-frequency power amplifier via said feedback line, using a controller connected to an input side of said high-frequency power amplifier;
(e) bringing said high-frequency power amplifier from a gain state, to an OFF state, by switching off said signal from being inputted to said high-frequency amplifier via said forward line;
(f) bringing said high-frequency power amplifier from said OFF state back to said gain state, by switching on said signal to being inputted to said high-frequency amplifier via said forward line;
(g) coinciding with step (e), using at least one switch for both communicating a reference voltage to a signal adapter, and connecting the signal adapter in a parallel loop in parallel with a portion of said feedback line and thereby supplying a control voltage from said feedback line at a second point to said signal adapter as input, and supplying said feedback line with an output of said signal adapter at a third point which is located functionally between said first and second points.
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Accused Products
Abstract
An arrangement for controlling a high-frequency power amplifier, including a high-frequency power amplifier, a feedback line between the input side and the output side of the high-frequency power amplifier, a control connected to the input side of the high-frequency power amplifier and communicating with the feedback line, a sampler and a detector connected to the feedback line between the output side and the input side of the high-frequency power amplifier, as well as a switch connected to the forward line for bringing the high-frequency power amplifier to an OFF state controlled by a control signal. A parallel loop provided with a reference voltage feed is connected to the feedback line. The loop includes a signal adapter, the transfer function of which is dimensioned to substantially correspond to the transfer function of a power control loop constituted by the forward line and the feedback line, measured at switching points of the parallel loop.
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Citations
11 Claims
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1. A method for controlling operation of a high-frequency power amplifier, comprising the steps of:
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(a) inputting a signal to be amplified to a high-frequency power amplifier via a forward line; (b) generating a sample signal from said forward line on an output side of said high-frequency power amplifier, to a feedback line; (c) detecting the sample signal at a first point in said feedback line, using a detector having a dynamic range; (d) controlling said high-frequency power amplifier via said feedback line, using a controller connected to an input side of said high-frequency power amplifier; (e) bringing said high-frequency power amplifier from a gain state, to an OFF state, by switching off said signal from being inputted to said high-frequency amplifier via said forward line; (f) bringing said high-frequency power amplifier from said OFF state back to said gain state, by switching on said signal to being inputted to said high-frequency amplifier via said forward line; (g) coinciding with step (e), using at least one switch for both communicating a reference voltage to a signal adapter, and connecting the signal adapter in a parallel loop in parallel with a portion of said feedback line and thereby supplying a control voltage from said feedback line at a second point to said signal adapter as input, and supplying said feedback line with an output of said signal adapter at a third point which is located functionally between said first and second points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An arrangement for controlling a high-frequency power amplifier, comprising:
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a high-frequency power amplifier provided in a forward line and having an input side and an output side; a feedback line functionally provided for said forward line, between the output side and the input side of said amplifier; a control means functionally connected to the input side of said amplifier and communicating with said feedback line; a sampler serving as input to said feedback line from said forward line; a detector connected to said feedback line between said output side and said input side of said amplifier; a switching means connected to the forward line for switching the amplifier between an OFF state and a gain state; a control unit operable for providing a control signal for operating said switching means for switching said amplifier; a parallel loop disconnectably connected in parallel with a portion of said feedback line and to be provided with a reference voltage feed; a signal adapter provided in said parallel loop, said signal adapter having a transfer function which substantially corresponds to the transfer function of a power control loop constituted by said forward line and said feedback line, measured where said parallel loop connects with said portion of said feedback line. - View Dependent Claims (10, 11)
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Specification