Broad-band radio-frequency generation circuit based on VC-TCXO (Voltage Control - Temperature Compensation Crystal Oscillator) array and frequency synthesizing chip

Abstract

The invention discloses a broad-band radio-frequency generation circuit based on a VC-TCXO (Voltage Control-Temperature Compensation Crystal Oscillator) array and a frequency synthesizing chip, which comprises a VC-TCXO (Voltage Control - Temperature Compensation Crystal Oscillator) array, a frequency synthesizing chip, a modulator, a direct digital frequency synthesizer, a power controller and adigital processor; the digital processor is connected with the control end of the VC-TCXO (Voltage Control - Temperature Compensation Crystal Oscillator) array, the control end of the frequency synthesizing chip, the control end of the power controller and the input end of the direct digital frequency synthesizer separately; the output end of the VC-TCXO (Voltage Control - Temperature Compensation Crystal Oscillator) array is connected with the reference input end of the frequency synthesizing chip; the output end of the frequency synthesizing chip is connected with the carrier input end of the modulator; the I / Q baseband output end of the direct digital frequency synthesizer is connected with the I / Q baseband input end of the modulator; and the output end of the modulator is connected with the signal input end of the power controller. The broad-band radio-frequency generation circuit has the advantages of wide output frequency range, high frequency resolution, low noise coefficient, good stray performance and the like.

Description

technical field [0001] The invention relates to the design and realization of a broadband radio frequency generating circuit based on a VC-TCXO array and a frequency synthesis chip. Background technique [0002] In modern communication systems, there are high requirements for frequency stability and accuracy of communication equipment. The RF signal generator is an indispensable key instrument in the process of system design and debugging. [0003] The original RF signal generator used one or more high-stability crystal oscillators to generate a series of discrete output signals through frequency multiplication, frequency division, and frequency mixing operations. This scheme has high signal stability and fast frequency conversion speed, but it is difficult to debug, strays are not easy to control, and the output resolution is low. [0004] With the continuous development of phase-locked loop technology, a new generation of radio frequency signal generators are widely used...

AI Technical Summary

Problems solved by technology

However, its output spurs are relatively serious, and the output frequency is low, so it has not been used for the generation of carrier signals.

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