Bidding purchasing information calibration circuits

Abstract

The invention discloses bidding purchasing information calibration circuits. A bidding purchasing information calibration circuit comprising a signal input circuit, a rectification and comparison circuit and a push-pull output circuit. The signal input circuit receives a signal at an input end of a signal transmission channel for a control terminal to receive a data signal, in a bidding purchasinginformation management system. The rectification and comparison circuit receives signals output by the signal input circuit, rectifies the signals through application of a rectification circuit composed of an operational amplifier AR1, an operational amplifier AR2, a resistor R7 and a capacitor C1, carries out frequency modulation on the signals through application of a frequency modulation circuit composed of a triode Q3, a triode Q4, a triode Q5 and a triode Q6, and compares and processes the signals output by the frequency modulation circuit and the rectification circuit through application of a comparer AR3, thereby stabilizing a signal static working point. Signal potential output by the frequency modulation circuit is fed back and adjusted through application of a variable resistorRW1 and a triode Q7. The push-pull output circuit carries out voltage stabilization on the signals and outputs the signals. Automatic signal calibration is realized, signal stability is improved, andsignal frequency modulation and distortion are prevented.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to a bidding procurement information calibration circuit. Background technique [0002] The 21st century is an era of knowledge economy characterized by "informatization", which involves all walks of life, and the information in the bidding and procurement process is also processed by "informatization". The bidding and procurement information management system has replaced the traditional manual or simple computer information processing methods , which realizes the unified and intelligent processing of bidding and procurement information, improves the security and confidentiality of information and the efficiency of data processing. The receiving data signal is relatively complicated, and it often happens that the data signal received by the control terminal in the bidding procurement information management system will hop frequency or even be distorted, which will lead to the diso...

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Problems solved by technology

[0002] The 21st century is an era of knowledge economy characterized by "informatization", which involves all walks of life, and the information in the bidding and procurement process is also processed by "informatization". The bidding and procurement information management system has replaced the traditional manual or simple computer information processing methods , which realizes the unified and intelligent processing of bidding and procurement information, improves the security and confidentiality of information and the efficiency of data processing. The receiving data signal is relatively complicated, and it often happens that the data signal received by the control terminal in the bidding procurement information management system will hop frequency or even be distorted, which will lead to the disorder of the bidding procurement information management system and bring serious problems to the entire bidding information process. as a result of

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