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Closed loop control system, and an amplifier in combination with such a closed loop control system

An amplifier and radio frequency amplifier technology, applied in control/regulation systems, amplifiers, high-frequency amplifiers, etc., can solve problems such as increased cost and reduce the size of components

Active Publication Date: 2015-03-18
ANALOG DEVICES INT UNLTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the device has a larger footprint on the integrated circuit chip, the cost increases

Method used

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  • Closed loop control system, and an amplifier in combination with such a closed loop control system
  • Closed loop control system, and an amplifier in combination with such a closed loop control system
  • Closed loop control system, and an amplifier in combination with such a closed loop control system

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Embodiment Construction

[0020] closed-loop controller implementation, usually indicated by 2, in figure 1 shown in combination with a radio frequency (RF) amplifier, generally indicated by 4. The controller 2 implements a control circuit with physical hardware. The control circuit is able to provide a bias signal for the RF amplifier 4 based on a feedback signal representing the output of the amplifier 4 and a demand value representing a desired value of the output of the RF amplifier 4 . As shown, the bias signal can be applied to, for example, the gate of a field effect transistor. figure 1 The system shown is arranged to set the current I through the load 14 or transistor 10 to a predetermined level. It will be appreciated that setting the current I through the load 14 or the transistor 10 can set the current flowing through the other of the load 14 and the transistor 10 . exist figure 1 In the arrangement shown, a transistor 10 is arranged to act as a radio frequency amplifier, the RF signal ...

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PUM

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Abstract

A control apparatus is provided that can provide high dynamic resolution and is suitable for inclusion within an integrated circuit. The control apparatus receives a demand signal representing a desired value of a measurand, and a feedback signal representing a present value or a recently acquired value of the measurand. The processing circuit forms a further signal a further signal which is a function of the demand and feedback signals. The further signal is then subjected to at least an integrating function. The demand signal, feedback signal or the further signal is processed or acquired in a sampled manner. The use of such sampled, i.e. discontinuous, processing allows integration time constants to be synthesised which would otherwise require the use of unfeasibly large components within an integrated circuit, or the use of off-chop components. Both of these other options are expensive.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to Great Britain Patent Application No. 1315389.5, filed 29 August 2013, entitled "CLOSED LOOP CONTROL SYSTEM, AND AN AMPLIFIER IN COMBINATION WITH SUCH A CLOSED LOOP CONTROL SYSTEM", the full text of which Incorporated herein by reference. technical field [0003] The present disclosure relates to closed loop control systems. The closed-loop control system can allow the adjustment of the controlled system to be performed with a resolution better than that of the digital control signal used to set the system parameters to target values, which resolution may be a dynamic resolution. Background technique [0004] Systems that control functions such as amplifier gain control or current control through devices typically include a closed loop control system such that the appropriate circuit receives a target value and automatically controls the target circuit so that it exhib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56H03F3/189
CPCH03F2200/129H03F3/21H03F2200/481H03G3/3089H03F2200/462H03F3/193H03F1/301H03F2200/18H03G3/3042H03F2200/451H03F2200/144H03G3/001H03F1/3205
Inventor R·A·博德纳尔P·J·普拉特D·伯克P·J·汤吉
Owner ANALOG DEVICES INT UNLTD
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