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A Clock Generator Driven by a Unified-CBiCMOS Buffer Driver for High Speed and Low Energy Operation

  • Toshiro Akino
  • Takashi Hamahata
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4148)

Abstract

A new operation mode for a lateral unified-complementary BiCMOS (hereafter abbreviated as U-CBiCMOS) buffer driver based on a partially depleted CMOS/SOI process is proposed. The scheme utilizes a gated npn or pnp BJT inherent to a n- or p-channel MOSFET. Forward current is applied to the base terminal of the channel MOSFET, with a normal pull-up or pull-down MOSFET as a current source, where each drain terminal is connected to the corresponding base terminal of the buffer. A new logic scheme is designed to feed an input signal to the gates of the pull-up and pull-down MOSFETs, rather than to those of the n- and p-channel MOSFETs as in our previous work, while also keeping both the n- and p-channel MOSFETs inactive and activating either the lateral npn or pnp BJT. A clock generator composing of the ring oscillator with a 21-stage CMOS inverter driven by the U-CBiCMOS buffer driver is designed. Circuit simulation using 0.35μm BSIM3v3 model parameters for the MOSFETs and a current gain of β F = 100 for the BJTs revealed the speed of the U-CBiCMOS buffer driver to be more than 4 times faster than that of an equivalent 4-stage CMOS (4SCMOS) inverter designed on the basis of logical effort for driving a load capacitance of 1.417 pF at V dd = 1 V.

Keywords

Load Capacitance Clock Generator Switching State Ring Oscillator Current Gain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Toshiro Akino
    • 1
  • Takashi Hamahata
    • 1
  1. 1.Program in Electronic System and Information Engineering, The Graduate School of Biology-Oriented Science and TechnologyKinki UniversityKinokawa, WakayamaJapan

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