一对数检测放大(LDA)系统系作为一高选择性接收升压器或一通信设备之一接收链中之一低噪声放大器之一代替。对数检测放大系统包含一放大电路、一采样电路以及至少一共振电路。放大电路系接收具有一第一频率之一输入信号并基于该输入信号产生一振荡。采样电路系耦接于放大电路并基于一默认阀值而终止该振荡，以借由该振荡与输入信号而周期性地钳住并重新开始该振荡以产生一串调制脉冲。共振电路系耦接于放大电路并创建一操作频率，且产生具有一第二频率之一输出信号，第二频率系实质与第一频率相同。

A logarithmic detector amplifying (LDA) system is provided for use as a high sensitivity receive booster or replacement for a low noise amplifier in a receive chain of a communication device. The LDA system includes an amplifying circuit configured to receive an input signal having a first frequency and generate an oscillation based on the input signal, a sampling circuit coupled to the amplifying circuit and configured to terminate the oscillation based on a predetermined threshold to periodically clamp and restart the oscillation to generate a series of pulses modulated by the oscillation and by the input signal, and one or more resonant circuits coupled with the amplifying circuit and configured to establish a frequency of operation and to generate an output signal having a second frequency, the second frequency being substantially the same as the first frequency.