Anti-interference intermediate frequency signal conditioner
An intermediate frequency signal and signal technology, applied in the direction of reducing electrical interference, etc., can solve the problems of A/D converter and computer with high speed requirements, difficult to achieve, interference effects, etc., to avoid strong anti-interference, easy to use, and high precision Effect
Active Publication Date: 2010-12-15
GUANGZHOU HAOYANG ELECTRONICS CO LTD
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Problems solved by technology
Existing processing method can have following several: 1) adopt the transmission of direct intermediate frequency signal, carry out digital processing directly after being converted by A / D, but as multi-channel signal detection, then the speed of A / D converter and computer are both High requirements, difficult to meet
2) After the intermediate frequency signal is used for precise full-wave rectification, it is directly transmitted, but when detecting small signals, it will be greatly affected
3) After precise full-wave rectification of the intermediate frequency signal, it is converted into V / F and converted into a frequency signal for transmission. However, when it becomes a certain frequency signal, it will also be greatly affected by interference
Method used
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Embodiment
[0015] The principle block diagram of the present invention is as figure 1 As shown, it includes an amplifier 1, a rectifier 2, a filtering and amplifying circuit 3, a triangular wave generator 4, a PWM synthesis circuit 5, and a differential output circuit 6, wherein the input terminal of the amplifier 1 is connected to the input port of the intermediate frequency signal, and the input port of the rectifier 2 The input end is connected with the output end of the amplifier 1, the input end of the filtering and amplifying circuit 3 is connected with the output end of the rectifier 2, the output end of the filtering and amplifying circuit 3 and the output end of the triangular wave generator 4 are connected with the input end of the PWM synthesizing circuit 5 The output end of the PWM synthesizing circuit 5 is connected to the input end of the differential output circuit 6 .
[0016] The circuit diagram of the present invention is as figure 2 As shown, in this embodiment, the ...
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The present invention is an intermediate frequency signal regulating device used in the strong interference occasion. The invention includes an amplifier (1), a rectifier (2), a filtering and amplifying circuit (3), a triangular-wave generator (4), a PWM synthesizing circuit (5) and a difference output circuit (6), wherein the input end of the amplifier (1) is connected with the input port of theintermediate frequency signal, the input end of the rectifier (2) is connected with the output end of the amplifier (1), the input end of the filtering and amplifying circuit (3) is connected with the output end of the rectifier (2), the output end of the filtering and amplifying circuit (3) is connected with the output end of the triangular-wave generator (4) and the input end of the PWM synthesizing circuit (5), and the output end of the PMW synthesizing circuit (5) is connected with the input end of the output circuit (6). The invention not only increases the anti-interference faculty of the small signal but also effectively avoid the disturbance of interfering signal with specific frequency. The invention has the advantages of simple structure, easy using, high switching speed and high precision, and the invention can be used to the occasion of transmitting the strong anti-interference alternating current and direct current signals.
Description
Technical field: [0001] The invention is an intermediate frequency signal conditioning device used in strong interference occasions, which belongs to the transformation technology of the intermediate frequency signal conditioning device with strong anti-interference. Background technique: [0002] In places where there are interfering signals such as intermediate frequency magnetic fields, such as medical equipment and nuclear magnetic testing equipment, control equipment such as computers need to be far away from the source of interference, and some on-site detection signals will also be seriously interfered during transmission. Such interference must be overcome for reliable signal transmission, especially over longer distances. Existing processing method can have following several: 1) adopt the transmission of direct intermediate frequency signal, carry out digital processing directly after being converted by A / D, but as multi-channel signal detection, then the speed of A...
Claims
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IPC IPC(8): H04B15/02
Inventor 唐露新陈辉吴黎明王桂棠唐劲天
Owner GUANGZHOU HAOYANG ELECTRONICS CO LTD