High-precision digital phase-locked amplifier and weak signal detection method
The invention designs a high-precision digital phase-locked amplifier and a weak signal detection method, and the method comprises the following steps: inputting an original signal to be detected by a detector, and forming an input signal through preprocessing circuits such as a filter and an amplif...
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| creator | SUI XIUBAO YUAN ZHEWEN YU CHANG CHEN QIAN YAO ZHEYI PAN JINGPENG |
| description | The invention designs a high-precision digital phase-locked amplifier and a weak signal detection method, and the method comprises the following steps: inputting an original signal to be detected by a detector, and forming an input signal through preprocessing circuits such as a filter and an amplifier; a sine and cosine signal which has the same frequency with an input signal and has a fixed phase difference is calculated through a direct digital frequency synthesis technology, and is multiplied by the input signal, so that a phase-sensitive detection function is realized; respectively carrying out low-pass filtering on the two multiplied components through a designed filter; and finally, the amplitude and the phase of the original input signal are calculated through the vector operation module. According to the invention, by designing and optimizing the phase-locked amplification algorithm, the accuracy of weak signal detection is effectively improved, and related information such as amplitude and phase of |
| format | Patent |
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| subjects | AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS RESONATORS TESTING |
| title | High-precision digital phase-locked amplifier and weak signal detection method |
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