A novel RF envelope detector with ultra-wide operation frequency range and enhanced transient response speed

Abstract

This paper presents an envelope detector that can be used in an ultra-wide operation frequency range (1 GHz∼10 GHz) and the transient response time of the detector is less than several nanoseconds. The detector comprises an operational trans-conductance amplifier (OTA), a mirror and a buffer. An extra discharging path is added specially to accelerate the fallingdown transient process. The value of the discharging current and the choice of the charging/discharging capacitor are the key factors in the transient process. The circuit is implemented using HuaHong 0.18 µm standard CMOS technology. Simulation and measured results are offered showing both better frequency (up to 10 GHz) and transient (several nanoseconds of delay) performance.

A novel automatic attenuator with ultra-fast response time

“…Vset1 and Vset2 are external signals used to force the control signal to be "1" or "0" as is mentioned before. Measured results of the detection output are described in detail in [12]. Fig.…”