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1V Wideband Frequency Synthesizer
Date Issued
2007
Date
2007
Author(s)
Su, Feng-Kuan
DOI
zh-TW
Abstract
A low cost, low voltage, wide-bandwidth and fast-locking of 3rd frequency synthesizer is designed. The single voltage-controlled oscillator (VCO) covered the frequency from 675 MHz to 1275 MHz. The divide-by-three prescaler is integrated on chip to provide the I/Q signals from 225 MHz to 425 MHz, and the outputs can be used as the LO of the UHF TV even-harmonic direct down-conversion.
The differential control help to shorten the response time of the charge pump. And, the propagation delay of the D flip-flops is reduced to facilitate high reference clock of phase frequency detector. The dead zone issue does not exist in this design. The frequency divider architecture is pulse-swallow counter. By controlled program counter and swallow counter, frequency divider operation range is between 2 to 192.
The frequency synthesizer was implemented in TSMC CMOS 0.18um 1P6M technology. The die size is 1.05×1.01 mm2. The supply voltage of the frequency synthesizer is 1V and the power consumption is 13 mW. The measured phase noise is -127.28 dBc/Hz at 1.45MHz offset from carrier.
The differential control help to shorten the response time of the charge pump. And, the propagation delay of the D flip-flops is reduced to facilitate high reference clock of phase frequency detector. The dead zone issue does not exist in this design. The frequency divider architecture is pulse-swallow counter. By controlled program counter and swallow counter, frequency divider operation range is between 2 to 192.
The frequency synthesizer was implemented in TSMC CMOS 0.18um 1P6M technology. The die size is 1.05×1.01 mm2. The supply voltage of the frequency synthesizer is 1V and the power consumption is 13 mW. The measured phase noise is -127.28 dBc/Hz at 1.45MHz offset from carrier.
Subjects
數位電視
頻率合成器
DTV
Synthesizer
DVB-H
Type
thesis
File(s)
No Thumbnail Available
Name
ntu-96-R92943064-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):994c540baff181a41770187360eec23c