← 返回 JSSC 论文列表JSSC 2008第2期RF & Wireless0.18μm CMOS
A Polar Modulator Using Self-Oscillating Amplifiers and an Injection-Locked Upcon
提出了一种用于非恒定包络信号的极性调制器，采用自振荡放大器和注入锁定上变频技术。
峰值输出功率8.26 dBm，漏极效率35%
极性调制器自振荡放大器注入锁定脉宽调制非恒定包络信号
▸基于异步脉宽调制的幅度调制技术
▸使用自振荡异步脉宽调制器减少杂散
▸注入锁定振荡器作为相位调制路径的高增益放大器
Abstract
A polar modulator for use with non-constant envelope
signals is presented. Techniques for efficient behavior of both the
amplitude (AM) and phase (PM) path are introduced.
The amplitude modulation technique is based on asynchronous
pulse-width modulation of a phase-modulated RF signal. The dig-
ital signal generated in this way is suited for amplification using a
nonlinear, efficient type of PA, while preserving the AM modula-
tion, since this information is present in the signal. The efficiency
of