Ultra wide band universal phase-locked loop module

Abstract

The invention discloses an ultra wide band universal phase-locked loop module, which relates to the field of communication. The ultra wide band universal phase-locked loop module comprises a crystal oscillator, a first power divider, a wideband phase-locked loop circuit, a CPLD, a one-out-of-two switch group, a numerical control frequency divider, a numerical control attenuator and an amplifier; the broadband phase-locked loop circuit comprises a phase discriminator, a loop filter, a VCO and a second power divider; the input signal is SPI control, and the SPI control is input to the CPLD; the crystal oscillator provides a reference source and is connected with the first power divider; the first power divider divides one path of power to the CPLD, and the other path of power is transmitted to the phase discriminator; the phase discriminator, the loop filter, the VCO and the second power divider are sequentially connected, the power of the second power divider is divided into one path to the one-out-of-two switch group, and the other path to the phase discriminator; the numerical control frequency divider is connected between the one-out-of-two switch groups, and the one-out-of-two switch group, the numerical control attenuator and the amplifier are sequentially connected. The loop bandwidth is adjusted by adjusting the current of the charge pump of the phase discriminator, so that ultra-wideband frequency coverage from middle and low frequencies to high frequencies is realized.

Description

technical field [0001] The invention relates to the communication field, in particular to an ultra-wideband general phase-locked loop module. Background technique [0002] PLL circuits are used in many scenarios in R&D and production, but most PLL modules are limited to narrow bandwidth and low frequency bands, and have poor compatibility. Redesign the circuit, affecting the progress of design and production. Contents of the invention [0003] Aiming at the above problems and technical requirements, the present invention proposes an ultra-wideband general phase-locked loop module. [0004] Technical scheme of the present invention is as follows: [0005] An ultra-wideband general-purpose phase-locked loop module, comprising: a crystal oscillator, a first power divider, a wide-band phase-locked loop circuit, a CPLD, a two-select-one switch group, a numerically controlled frequency divider, a numerically controlled attenuator, and an amplifier; the wideband phase-locked T...

AI Technical Summary

Problems solved by technology

[0002] PLL circuits are used in many scenarios in R&D and production, but most PLL modules are limited to narrow bandwidth and low frequency bands, and have poor compatibility. Redesign the circuit, affecting the schedule of design and production

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