Title :
A 1.57mW 99dBΩ CMOS transimpedance amplifier for VHF micromechanical reference oscillators
Author :
Li, Ming-Huang ; Li, Cheng-Syun ; Hou, Li-Jen ; Liu, Yu-Chia ; Li, Sheng-Shian
Author_Institution :
Inst. of NanoEngineering & Microsyst., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
This work investigates a low-power transimpedance amplifier (TIA) topology suited for VHF micromechanical oscillator applications. The TIA circuit comprises of a regulated-cascode (RGC) transimpedance gain stage and an inverter-based wideband Cherry-Hooper amplifier with capacitive peaking. The circuit was designed using TSMC 0.18μm CMOS technology, exhibiting mid-band gain of 99dBμ and 3dB bandwidth of 280MHz while dissipating only 1.57mW from a 1.5V supply. A linear RLC equivalent model extracted from a practical 48MHz Lamé-mode resonator with Q>;40,000 was interfaced with the TIA circuit in a series-resonant oscillator configuration, showing simulated phase-noise less than -128dBc/Hz at 1kHz offset.
Keywords :
CMOS analogue integrated circuits; RLC circuits; VHF oscillators; low-power electronics; micromechanical resonators; operational amplifiers; oscillators; wideband amplifiers; CMOS transimpedance amplifier; Lame-mode resonator; RGC transimpedance gain stage; TIA circuit; TIA topology; TSMC CMOS technology; VHF micromechanical reference oscillators; bandwidth 280 MHz; capacitive peaking; inverter-based wideband Cherry-Hooper amplifier; linear RLC equivalent model; low-power transimpedance amplifier; phase noise; power 1.57 mW; regulated-cascode transimpedance gain stage; series-resonant oscillator configuration; size 0.18 mum; voltage 1.5 V; Bandwidth; Gain; Impedance; Micromechanical devices; Oscillators; RLC circuits; Resonant frequency;
Conference_Titel :
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0218-0
DOI :
10.1109/ISCAS.2012.6271695
