System for accurately detecting amplitude of input signal
An input signal and precise technology, applied in the field of communication systems, can solve problems such as poor detection accuracy, small detection range, increased cost and complexity, and achieve the effects of reducing cost and complexity, eliminating the influence of temperature changes, and improving detection accuracy
Active Publication Date: 2021-11-05
苏州瀚宸科技有限公司
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Problems solved by technology
Therefore, the set DC voltage V 19 There is also no guarantee that V in_th is an exact fixed value
[0009] Therefore, the conventional high-frequency input amplitude detection method has the following disadvantages: 1. The detection accuracy is poor; 2. The detection range is small; 3. The temperature change affects the detection accuracy; cost and complexity
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[0037] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0038] An embodiment of the present invention provides a system for accurately detecting the amplitude of a high-frequency input signal. When the system starts to work, it enters the automatic calibration mode: according to the set amplitude, a high-speed reference signal is generated. After the high-speed reference signal is amplified, it is sent to ...
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The invention discloses a system for accurately detecting the amplitude of an input signal. The system comprises a two-way selector, a comparator, a digital logic circuit, a register, a digital-to-analog converter and a reference signal source, wherein an input signal is coupled to the first input end of the two-way selector, and the output end of the reference signal source is coupled to the second input end of the two-way selector; the output end of the two-way selector is coupled with the first input end of the comparator; the second input end of the comparator is coupled with the output end of the digital-to-analog converter; the input ends of the digital logic circuit and the register are coupled with the output end of the comparator, and the output ends of the digital logic circuit and the register are coupled with the input end of the digital-to-analog converter; and the output end of the comparator outputs an indication signal and is used for judging whether the amplitude of the input signal exceeds a set threshold value or not. According to the invention, the amplitude of the high-frequency input signal can be accurately detected.
Description
technical field [0001] The invention relates to the field of communication systems, in particular to a system for accurately detecting the amplitude of an input signal. Background technique [0002] Detection of the input signal amplitude is a common requirement in communication systems. Accurate amplitude detection with sufficient range can provide very useful information for communication systems. In wireless communication and wired communication, the input signal is generally a high-frequency signal, which requires an amplitude / peak detection circuit to convert it into a DC voltage / current, and compare it with a DC reference voltage / current to determine whether the input amplitude is greater or less than the set threshold. [0003] Such as figure 1 In the conventional input signal amplitude detection scheme shown, the input signal is superimposed with a DC offset voltage 3, amplified by the amplifier 4, superimposed with a DC offset voltage 5, converted into a DC voltag...
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IPC IPC(8): G01R31/3181
CPCG01R31/3181
Inventor李旋
Owner苏州瀚宸科技有限公司