Gain correction control device

Abstract

The invention discloses a gain correction control device which comprises a signal input end, a signal output end, a gain-adjustable high-frequency signal processing circuit, a signal power detection circuit, an error amplifier circuit, a correction signal latch circuit, a first radio frequency switch and a second radio frequency switch. The gain correction of the high-frequency signal processing circuit is more accurate.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a gain correction control device. Background technique [0002] Such as figure 1 As shown, when the high-frequency signal processing circuit is produced, the parasitic parameters of the circuit cannot be the same as the simulation evaluation, and the gain of the circuit in each production batch cannot be guaranteed to be consistent, so the gain correction needs to be corrected by the gain correction control device. An existing gain correction control device is used in the integrated circuit signal chain, which mainly includes a gain-adjustable high-frequency signal processing circuit 1', a digital-to-analog conversion module 2', a fuse module 3' (fuse blowing module ); where the input terminal of the high-frequency signal processing circuit 1' is used to access the radio frequency input signal; the output terminal of the high-frequency signal processing circuit 1' is used to o...

AI Technical Summary

Problems solved by technology

[0004] 1. When the RF input signal input at the input terminal of the high-frequency signal processing circuit 1' is unstable, the power of the signal output at the output terminal of the high-frequency signal processing circuit 1' will change in real time. At this time, it is difficult to control the Fuse module 3 'to adjust the gain of the high-frequency signal processing circuit 1' to a specified range;

[0005] 2. Considering that the input terminal of the high-frequency signal processing circuit 1' is an external radio frequency input signal, and the input terminal of the high-frequency signal processing circuit 1' is an external signal power detection instrument, the input terminal and the input terminal of the high-frequency signal processing circuit 1' are changed. The impedance matching of the output terminal under actual application conditions cannot be measured to truly reflect the gain of the high-frequency signal processing circuit 1' under actual application conditions, so it is difficult to make the gain correction of the high-frequency signal processing circuit 1' consistent ;

[0006] 3. When the power of the RF output signal is detected by the signal power detection instrument, errors will be introduced, which may easily cause signal blockage and seriously affect the parameters such as the 1dB compression point and the third-order intermodulation point of the RF input signal and the RF output signal;

[0007] 4. It is necessary to control the disconnection of the fuse module 3', and the cost is relatively high

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