GaAs HBT (Heterojunction Bipolar Transistor) super-high-speed 2-frequency divider

Abstract

The invention discloses a GaAs HBT (Heterojunction Bipolar Transistor) super-high-speed 2-frequency divider which mainly solves the problems of narrower working frequency range and low frequency of the traditional frequency dividers. The 2-frequency divider mainly comprises an input buffer, a frequency divider core component, an output buffer and a biasing circuit, wherein the input buffer passes through a difference amplifying circuit and then is differentially output to the frequency divider core component through an emitter follower; the frequency divider core component adopts a T-type trigger which has a principal and subordinate structure and consists of a current-mode logic (CML) circuit, and the T-type trigger is output to the output buffer; the output buffer passes through the emitter follower and then is output through the difference amplifying circuit; and the biasing circuit adopts a Bata-help current mirror structure to provide bias voltage for other circuits. The frequency divider has the advantages of high drive capability, accurate level conversion, strong common-mode noise suppression, good stability and high working frequency and is suitable for being used as a super-high-speed N-stage cascading 2N-frequency divider and a phaselocked loop type frequency synthesizer.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, in particular to a GaAs heterojunction bipolar transistor HBT ultra-high-speed frequency divider, which can be used for integrated circuit design and signal processing. Background technique [0002] A frequency divider is a signal device that can process an input high frequency signal and output a low frequency signal, and is widely used in communication equipment. Typically, frequency dividers are implemented using flip-flop circuits or latch circuits. The frequency divider is an important part of the phase-locked loop, and its working speed directly determines the application range of the phase-locked loop. High-speed communication is an inevitable trend of the development of the information age. Therefore, it is imperative to increase the working speed of the frequency divider. [0003] The current frequency divider is mainly divided into two types: ordinary frequency divider and...

AI Technical Summary

Problems solved by technology

The operating frequency range of this type of circuit is relatively narrow and relatively low, which cannot meet the requirements of ultra-high frequency circuits

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