A differential summation circuit and electrical equipment
A differential action and differential technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve problems such as output signal distortion, control system parallel feedback loop control, etc.
Active Publication Date: 2020-11-03
GUANGDONG NUCLEAR POWER JOINT VENTURE +3
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Problems solved by technology
[0004] The present invention provides a differential summation circuit and electrical equipment, aiming at solving the problem of output signal distortion after differential operation in the differential circuit existing in the traditional technical solution and the inability to perform single-variable or multi-variable parallel feedback loop control on the control system The problem
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[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0017] figure 1 A schematic diagram of the module of the differential summation circuit provided by the preferred embodiment of the present invention is shown. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:
[0018] refer to figure 1 , the differential and summation circuit, including: an input matching circuit module 10 , a differential circuit module 20 , a signal selection circuit module 30 , an addition circuit module 40 and a power supply module 50 .
[0019] Among them, the input matching circuit module 10 is configur...
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The invention discloses a differential summation circuit. The differential summation circuit comprises an input matching circuit module, a differential circuit module, a signal selection circuit module and an addition circuit module; differential signals subjected to input matching circuit module filtering and voltage following processing are subjected to differential processing by the differential circuit module so as to output differential action signals; the signal selection circuit module is used for carrying out positive adjustment, negative adjustment or positive and negative adjustmenton the differential action signals so as to output a differential result, and the differential result and external signals are added through the addition circuit module; according to the differentialsummation circuit, the positive adjustment, the negative adjustment or the positive and negative adjustment can be carried out on the differential action signals through the signal selection circuit module, so that the differential operation precision is high, and meanwhile, the differential action signals are prevented from being distorted when being output; and meanwhile, the addition circuit module is further arranged, the external signal and the differential signals can be introduced for addition and summation, so that single-variable or multi-variable parallel feedback loop control is carried out on the control system.
Description
technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a differential summation circuit and electrical equipment. Background technique [0002] At present, the differential circuit includes a passive differential circuit and an active differential circuit. The passive differential circuit is composed of a capacitor C and a resistor R in series, while the active differential circuit is composed of an operational amplifier, an input capacitor and a feedback resistor. Although the active differential circuit The output voltage is proportional to the time derivative of the input voltage, but the phase is 180° different from the theoretical differential operation result, which makes the input signal meaningless after being differentiated by the differential circuit; at the same time, the output voltage signal of the differential circuit and the voltage sum of the input signal The frequency is proportional, and the op...
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IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 周仁华王国云涂画林楚发王誉霖
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE