Voltage-controlled group delay adjusting module, numerical control adjusting circuit and radio frequency microwave circuit

Abstract

The invention provides a voltage-controlled group delay adjusting module, a numerical control adjusting circuit and a radio frequency microwave circuit, and the module comprises a filter which receives an input signal and is used for selecting a working frequency band and filtering an interference signal; a negative group delay unit connected to the output end of the filter and used for transmitting the signal and adjusting the negative group delay characteristic of the signal; a first variable capacitance diode connected to the main circuit of the negative group delay unit, wherein the group delay characteristic is adjusted based on the reverse bias voltage of the first variable capacitance diode; and a transformer, wherein a primary coil receives the first tuning voltage, a secondary coil is connected to the two ends of the first variable capacitance diode, and the transformer is used for conducting voltage transformation adjustment on the first tuning voltage and applying the first tuning voltage to the two ends of the first variable capacitance diode so as to change the reverse bias voltage of the first variable capacitance diode. According to the invention, the group delay characteristic of the circuit is effectively adjusted through voltage adjustment, the circuit is used for compensating the group delay characteristic of a filter, an amplifier and even a radio frequency microwave circuit, and more accurate numerical control adjustment is realized through configuration of a peripheral DAC circuit.

Description

technical field [0001] The invention relates to the field of integrated circuit design, in particular to a voltage-controlled group delay adjustment module, a numerical control adjustment circuit and a radio frequency microwave circuit. Background technique [0002] The concept of group delay was first proposed by Americans in the 1930s. It is used to measure the phase distortion of equipment. It is the transmission time it takes for signals to pass through equipment at different frequencies, and is a derivative of the phase characteristics of equipment. , is closely related to the frequency. In the process of signal transmission, to measure the pros and cons of a transmission system, we need to analyze the frequency characteristics and time domain characteristics of the system at the same time. A good signal transmission system must not only have good consistency of amplitude-frequency characteristics, but also At the same time, it should have a good phase-frequency charac...

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a voltage-controlled group delay adjustment module, a numerical control adjustment circuit and a radio frequency microwave circuit, which are used to solve the problem of poor consistency of group delay characteristics in the prior art

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