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Phase-locked loop based on MEMS (Micro-electromechanical Systems) wideband phase detector

A phase detector and broadband technology, applied in the field of phase-locked loops, can solve problems such as the inability to meet the needs of broadband communication systems, and achieve the effects of novel structure, synchronous adjustment, and convenient operation.

Active Publication Date: 2016-11-09
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the currently widely used phase-locked loops are locked for a single frequency point, which cannot meet the needs of broadband communication systems

Method used

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  • Phase-locked loop based on MEMS (Micro-electromechanical Systems) wideband phase detector
  • Phase-locked loop based on MEMS (Micro-electromechanical Systems) wideband phase detector
  • Phase-locked loop based on MEMS (Micro-electromechanical Systems) wideband phase detector

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Embodiment Construction

[0013] like figure 1 , 2 Shown in and 3, a kind of phase-locked loop based on MEMS broadband phase detector, comprises MEMS broadband phase detector, DC automatic gain control AGC amplifier, the first voltage-controlled oscillator VCO1, the second voltage-controlled oscillator VCO2, The first variable resistor R1 and the second variable resistor R2; the power supply V E The first voltage-controlled oscillator VCO1 is loaded through the first variable resistor R1, and the DC automatic gain control AGC amplifier is loaded through the second variable resistor R2 at the same time; the first voltage-controlled oscillator VCO1 generates a reference signal, by adjusting the first The size of a variable resistor R1 changes the control voltage V of the first voltage-controlled oscillator VCO1 C1 The reference signal and the feedback signal are respectively loaded to two symmetrical input ports formed by the ground wire 2 and the CPW signal wire 3 of the MEMS broadband phase detector,...

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Abstract

This invention discloses a phase-locked loop based on MEMS (Micro-electromechanical Systems) wideband phase detector. The phase-locked loop comprises a MEMS wideband phase detector, a direct-current automatic gain control AGC amplifier, a first voltage-controlled oscillator VC01, a second voltage-controlled oscillator VC02, a first variable resistor R1 and a second variable resistor R2. The phase-locked loop provided by the invention has the following beneficial effects: by utilizing the MEMS wideband phase detector, the phase-locked loop has the characteristics of the wide band so as to lock reference signals of different frequencies; through utilizing the variable resistors to control the voltage of the voltage-controlled oscillators and the gain of the direct-current automatic gain control AGC amplifier, the reference signals and feedback signals are adjusted synchronously and locked when the circuit fluctuation exists. The phase-locked loop has new structure and convenient operation, and is compatible with GaAs monolithic microwave integrated circuits.

Description

technical field [0001] The invention relates to the field of micro-electromechanical systems, in particular to a phase-locked loop based on a MEMS wide-band phase detector. Background technique [0002] Phase-locked loop is a technology that uses the principle of feedback control to achieve frequency and phase synchronization. When the frequency or phase of the reference signal changes, the phase-locked loop will detect this change and adjust the output frequency through the feedback system until the final The output signal and the reference signal reach a locked state with the same frequency and constant phase difference. PLLs are used in many fields, such as wireless communication, radar, digital TV, broadcasting, etc. [0003] Most of the phase-locked loops widely used at present are locked to a single frequency point, which cannot meet the needs of broadband communication systems. In addition, microelectronics technology promotes the development of circuit systems in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/085H03L7/099H03L7/107
CPCH03L7/085H03L7/099H03L7/1072
Inventor 廖小平韩居正
Owner SOUTHEAST UNIV
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