A system for accurately detecting the amplitude of an input signal
A technology of input signal and amplitude, which is applied in the field of communication systems, can solve the problems of poor detection accuracy, small detection range, increased cost and complexity, etc., and achieve the effect of reducing cost and complexity, eliminating the influence of temperature changes, and improving detection accuracy
Active Publication Date: 2022-05-03
苏州瀚宸科技有限公司
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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; 4. It needs to be adjusted according to the test after chip production, which greatly increases 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 described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0038] An embodiment of the present invention provides a system for accurately detecting the amplitude of an 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...
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The invention discloses a system for accurately detecting the amplitude of an input signal, comprising: a two-way selector, a comparator, a digital logic circuit and a register, a digital-to-analog converter, and a reference signal source; the input signal is coupled to the two-way selector The first input terminal, the output terminal of the reference signal source is coupled to the second input terminal of the two-way selector; the output terminal of the two-way selector is coupled to the first input terminal of the comparator; The second input terminal of the comparator is coupled to the output terminal of the digital-to-analog converter; the input terminal of the digital logic circuit and the register is coupled to the output terminal of the comparator, and the output terminal of the digital logic circuit and the register is coupled connected to the input terminal of the digital-to-analog converter; the output terminal of the comparator outputs an indication signal for judging whether the amplitude of the input signal exceeds a set threshold. The invention can accurately detect the amplitude of the high-frequency input signal.
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] like 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 voltage b...
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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