Power-Efficient Body-Coupled Self-Cascode LC Oscillator for Low-Power Injection-Locked Transmitter Applications

M. Haider, S. Islam
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引用次数: 2

Abstract

Improving the efficiency and the power consumption of a RF transmitter in a wireless sensor network is a major design challenge. Unlike conventional transmitter architectures, injection-locked transmitter (ILTX) provides high efficiency with reduced power consumption. The core block of an ILTX is an injection-locked oscillator. Therefore this paper reports a low-voltage low-power injection-locked LC oscillator employing self-cascode structure and body-terminal coupling. Self-cascode structure of the oscillator provides low-voltage and low-power operation while body terminal coupling facilitates low-power operation without degrading voltage headroom. The proposed oscillator has been fabricated using 0.18-μm RF CMOS process. Measurement results indicate that the designed oscillator can operate with a supply voltage as low as 1 V and exhibits 36.75 MHz locking range for an injection signal of 1.29 GHz at 0 dBm. The core oscillator consumes only 2 mW of power that makes the proposed design highly suitable for low-power transmitter applications.
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低功率注入锁定发射机应用的高效体耦合自级联LC振荡器
提高无线传感器网络中射频发射机的效率和功耗是一个主要的设计挑战。与传统的发射机架构不同,注入锁定发射机(ILTX)在降低功耗的同时提供高效率。ILTX的核心模块是一个注入锁定振荡器。为此,本文报道了一种采用自级联结构和体端耦合的低压低功率注入锁定LC振荡器。振荡器的自级联结构提供了低电压和低功耗工作,而体端耦合则在不降低电压净空的情况下实现了低功耗工作。该振荡器采用0.18 μm RF CMOS工艺制备。测量结果表明,所设计的振荡器可以在低至1 V的电源电压下工作,在0 dBm的1.29 GHz注入信号下具有36.75 MHz的锁定范围。核心振荡器仅消耗2 mW的功率,这使得所提出的设计非常适合低功率发射机应用。
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