標題: 2 伏 110MHz 的 CMOS 向量調變器
A 2V 110MHz CMOS Vector Modulator
作者: 張宏德
Chang, Horng-Der
吳介琮
Jieh-Tsorng Wu
電子研究所
關鍵字: 低電壓;向量;調變器;Low Voltage;Vector;Modulator
公開日期: 1995
摘要: 本篇的論文描述一個工作在 2 伏, 110 MHz 的相位及振幅的向量調變器
設計.它包含了多相位壓控振盪器, 相位選擇器, 和一個可調增益的輸出
級電路.多向位壓控振盪器是向量調變器的主要核心, 它是 8 乘 4 的陣
列式偶合環圈振盪器,可產生 64 個不同相位的差動訊號. 相位的精確度
可以達到 1/8 個反向器之延遲.使用了三對輸入的反向器細胞元, 保證只
振盪在單一模式下.相位選擇器選出 64 個訊號中的一組訊號送到輸出級
電路. 訊號的選取由一個 6 位元數位輸入的相位解碼器執行. 輸出級是
一個電流模式的電路, 電流增益為 6.輸出級電路也包含了電流分割器,
它把放大的電流等分成 7 等分, 而且由一個 3 位元數位輸入的振幅解碼
器控制.本向量調變器的製程為 TSMC 0.6um SPDM CMOS 的製程, 晶片大
小為2800um x 2800umm, 包含 PAD. 工作電壓為 2 伏, 輸出的中心頻率
為 20 MHz 到160 MHz, 晶片的全耗功率為 80 mW.本向量調變器還包含了
一個相鎖迴路, 由另外一位同學所設計.
This thesis describs the design of a 2V, 110MHz CMOS phase-
magnitudevector modulator chip, which consists of a multi-phase
voltage-controlledoscillator (VCO), a phase selector, and a
variable gain output buffer.The multi-phase VCO is the core of
the vector modulator. It is a 8 by 4coupled ring oscillator
array and can generate 64 differential signals ofdifferent
phases. The phase difference is only 1/8 of the gate delay.The
use of 3-input delay cell ensures the single operation mode.The
phase selectors choose one of the 64 signals for output. The
phase is digitally selected by a 6-bit digital input through a
phase decoder.The output buffer is a current-mode circuit, which
has a current gain of6. A current divider is also included in
the output buffer, which has adivide ratio of 1 to 7, and can be
digitally controlled by a 3-bit magnitude decoder.The vector
modulator has been implemented with the TSMC 0.6um SPDM
CMOStechnology. Total chip size is 2800um x 2800um, including
pads. Operatingfrom a single 2V supply, the output frequency can
vary from 20 MHz to160 MHz. Total power consumption is 80 mW.The
chip also includes a phase-locked loop (PLL), which is describes
inanother thesis.
URI: http://140.113.39.130/cdrfb3/record/nctu/#NT840430085
http://hdl.handle.net/11536/60690
顯示於類別:畢業論文