Communicaiton system and method

Abstract

The invention provides a communication system and related methods. In a communication system, a frequency synthesizer synthesizes a tuning signal according to a frequency-divided data and a fixed-frequency reference signal for modulating a signal to be transmitted. When an amplifying circuit in the communication system of the present invention is to amplify the power of the signal to be transmitted, the communication system of the present invention can adjust the equivalent impedance of the capacitance-inductive tank load circuit of the amplifying circuit according to the value of the frequency division data, so that The passband of the equivalent impedance can be shifted in the frequency domain to match the frequency range of the signal to be transmitted. In this way, the communication system of the present invention can dynamically adjust the equivalent impedance of the capacitive tank to perform equal tuning and amplification for different frequency ranges in a wide frequency band.

Description

technical field [0001] The present invention relates to a communication system and a related method, in particular to a communication system and a related method capable of dynamically adjusting equivalent impedance according to the signal frequency range to amplify signals in different frequency ranges with equal power. Background technique [0002] Generally speaking, when the communication system needs to transmit data, the communication system will modulate the data to be transmitted to form a corresponding signal to be transmitted, and then use an amplification circuit to amplify the power of the signal to be transmitted to send the signal. Please refer to figure 1 , which shows a circuit diagram of a conventional tuning amplifier circuit 10 . The amplifying circuit 10 is biased between the DC voltage V and the ground terminal voltage G, and an n-type metal oxide semiconductor transistor M0 is arranged in it to realize an amplifier, and the capacitor Cp and the inducto...

AI Technical Summary

Problems solved by technology

However, the existing traditional tuned amplifier circuit 10 is formed by a fixed value capacitor Cp and a fixed value inductor Lp, so its gain and bandwidth will be mutually restrained

If the combination of capacitor Cp and inductor Lp has a high Q value, the bandwidth will be sacrificed, and equal power gain cannot be provided for the signals to be transmitted in different channels

If the combination of capacitor Cp and inductor Lp has a low Q value, the gain will be sacrificed and better power gain cannot be provided.

Therefore, it is difficult for the existing fixed-value capacitance-sensing tank tuning amplifier circuit in the communication system to take into account the requirements of power gain and bandwidth

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