摘要
一种适用于ASK接收器中的双极型对数中频放大器,具有接收信号强度指示的功能(RSSI)。这种放大器实现了对数响应的分段近似,同时作为信号解调的一部分。本文介绍了RSSI特殊的具体电路及其结构。该放大器包含五级放大,每一个放大级都由一个限幅放大器和跨导单元组成。此放大器在±1dB的线性度下实现了90dB的动态范围。
A bipolar logarithmic intermediate-frequency (IF) amplifier with received signal strength indicator (RSSI) circuit for ASK Receiver is presented. The amplifier realizes a piecewise approximation to an exact logarithmic response. In the demodulating Log Amplifiers, a special architecture of RSSI is proposed. There are five stages in Log amplifiers. Each consists of a limiter amplifier and a gm ceil. A 90 dB input dynamic range within ±1 dB linearity is achieved.
出处
《电子器件》
EI
CAS
2006年第1期44-47,共4页
Chinese Journal of Electron Devices
基金
上海市科委资助项目(037062010&AM0308)