本論文提出一個低功率的正交相位移鍵發射機。此發射機架構避免使用高耗能的正交電壓控制振盪器及鎖相迴路。透過注入鎖定的技術，穩定發射機的操作頻率並抑制相位雜訊。利用低頻率低耗能的注入鎖定振盪器來產生相位變化，並使用倍頻電路將頻率提升至載波頻率，輸出正交相位。除此之外，發射機與分數型頻率合成器整合，具有高解析度多通道通訊的功能。輸出級為一個低功率操作的非線性功率放大器。能支援正交相位移鍵、頻率移鍵、及開關鍵控三種調變方式。
此晶片使用台積電90奈米 1P9M金氧互補式半導體製程製作。發射機的操作頻率為工業、科學、醫療用頻帶(ISM) 433百萬赫茲，供應電壓為1伏特。在模擬結果中，輸出功率為 -18.5 dBm下，消耗0.51毫瓦，正交相位移鍵調變的誤差向量幅度EVM為4 %，資料速率為每秒1.6百萬位元。晶片尺寸為1.14×0.74平方毫米。

This thesis proposes a low-power quadrature phase shift keying (QPSK) transmitter. This architecture avoids to use high power quadrature voltage control oscillator (QVCO) and phase locked loop (PLL). Injection locking technique is utilized to stable the operating frequency and suppress the phase noise. A low frequency, low power injection-lock oscillator is employed to generate the required phase shift. And then, the quadrature phase output is produced by a frequency multiplier. The output stage is a nonlinear power amplifier with low power operation feature. Besides, this transmitter is combined with fractional type frequency synthesizer and possesses the ability of high resolution multi-channel communication. In addition, this transmitter supports three kinds of modulation such as QPSK, FSK and OOK.
The prototype chip is fabricated with TSMC 90 nm 1P9M CMOS process. The operating frequency of transmitter is industry, science, medical band (ISM ) 433 MHz. The supply Voltage is 1 V. The output power is -18.5 dBm, consuming 0.51 mW, EVM is 4% and data rate is 1.6 Mb/sec in simulation. The chip size is 1.14×0.74 mm2.

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