Low Voltage/Low Power CMOS VCO (Special Section on Selected Papers from the 11th Workshop on Circuits and Systems in Karuizawa)
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概要
- 論文の詳細を見る
In this paper we introduce a CMOS low voltage/low power (LV/LP) voltage controlled oscillator (VCO). It includes a simple V-I converter, a current controlled ring oscillator based on new differential delay cells, and a source-coupled differential pair to convert differential signal to single-ended signal. The V-I converter is implemented as a source follower type, exhibiting excellent linearity of transconductance with low power consumption. The new delay cell employs local positive feedback to increase its DC gain, achieving stable oscillation at low supply voltage. The simulation and measurement results are given to show the linearity between the input (control voltage) and the output (frequency) in the frequency range of 100 MHz to 400 MHz with 1.2 V power supply. The VCO only consumes power of 2.25 mW at operating frequency of 400 MHz and 1.2 V supply.
- 1999-03-25
著者
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KOKUBO Masaru
Central Research Laboratory, Hitachi, Ltd.
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AOKI Hirokazu
Semiconductor and Integrated Circuits group, Hitachi Ltd.
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HWANG Changku
MIPS Processor Division, PMC-Sierra Inc.
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HWANG Changku
R&D Division, Hitachi America LTD.
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Kokubo M
Communication Device Research Department Central Research Laboratory Hitachi Ltd.
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Kokubo Masaru
Central Research Laboratory Hitachi Ltd.
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Kokubo Masaru
Communication Device Research Department Central Research Laboratory Hitachi Ltd.
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Hwang C
Micrys Inc.:(present Address) Research & Development Division Hitachi America Ltd.
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Hwang Changku
Mips Processor Division Pmc-sierra Inc.
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Aoki H
Modech Inc. Hachioji-shi Jpn
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Aoki H
Toshiba Corp. Yokohama‐shi Jpn
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