GaAs heterojunction bipolar transistor (HBT) ultraspeed clock distributor circuit

Abstract

The invention discloses a GaAs heterojunction bipolar transistor (HBT) ultraspeed clock distributor circuit which comprises a clock predriver, secondary clock drivers, a clock path transmission line, series resistors and a termination resistance capacitance network, wherein the clock predriver is used for buffering and amplifying input sine differential clock signals CLK_P and CLK_N, and outputting the sine differential clock signals to the secondary clock drivers; the number of the secondary clock drivers is related to the number of loads to be driven, and the secondary clock drivers are used for buffering and amplifying the output signals C1_P and C1_N of the clock predriver again and outputting the signals to the clock path transmission line; the clock path transmission line is used as the clock signal transmission path for transmitting the clock signals C2_P, C2_N, C3_P and C3_N output by the secondary clock drivers to the loads; and the series resistors and the termination resistance capacitance network on the clock path transmission line are used for enhancing the integrality of the clock signals in the overall ultraspeed circuit. The distributor circuit of the invention is utilized to provide favorable integrality of clock signals.

Description

technical field [0001] The invention relates to the technical field of semiconductor integrated circuit design, in particular to a GaAs HBT ultra-high-speed clock distribution circuit. Background technique [0002] Gallium Arsenide Heterojunction Bipolar Transistor (GaAs HBT) has become one of the best choices for designing and manufacturing radio frequency circuits and ultra-high-speed digital-analog hybrid circuits due to its excellent high-frequency and breakdown performance. Integrated circuits designed and manufactured using GaAs HBT technology have higher operating frequency and wider bandwidth, and have good device matching performance, and are suitable for ultra-high-speed large-scale digital-analog hybrid integrated circuits. [0003] In these ultra-high-speed circuits based on GaAs HBT technology, the clock signal usually reaches above GHz, so it is usually not provided in the form of square wave, but can only be provided in the form of sine wave which is more conv...

AI Technical Summary

Problems solved by technology

Improperly designed clock path transmission lines will cause signal mismatch and reflection, ringing and overshoot, etc., which will cause circuit disorder and cannot work normally at ultra-high-speed clock frequencies

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