Title :
A low-power, 26-GHz transformer-based regulated cascode transimpedance amplifier in 0.25µm SiGe BiCMOS
Author :
Li, Cheng ; Palermo, Samuel
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
A 26 GHz transimpedance amplifier (TIA) with transformer-based regulated cascode (RGC) input stage is proposed and analyzed. The transformer enhances the effective transconductance of the TIA´s input common-base transistor; reducing the input resistance and providing considerable bandwidth extension. The TIA is implemented in a 0.25μm BiCMOS technology. Measurement shows the single-ended transimpedance gain of 53dBΩ with -3dB bandwidth of 26 GHz. Total chip power, including an output buffer, is 28.2mW from a 2.5V supply; while core TIA power is 8.2mW. The measured average input-referred noise current spectral density is 21.3 pA/√Hz. Total chip area, including pads, is 960μm×780μm.
Keywords :
BiCMOS analogue integrated circuits; field effect MMIC; microwave amplifiers; operational amplifiers; transformers; BiCMOS technology; SiGe; TIA input common-base transistor;; average input-referred noise current spectral density; bandwidth 26 GHz; frequency 26 GHz; input resistance; power 28.2 mW; power 8.2 mW; single-ended transimpedance gain; size 0.25 mum; transformer-based regulated cascode TIA; transformer-based regulated cascode transimpedance amplifier; voltage 2.5 V; Bandwidth; BiCMOS integrated circuits; Couplings; Gain; Noise; Semiconductor device measurement; Transistors; BiCMOS; Common-Base (CB); Common-Emitter (CE); LNA (Low Noise Amplifier); Regulated Cascode (RGC); Transimpedace Amplifier (TIA);
Conference_Titel :
Bipolar/BiCMOS Circuits and Technology Meeting (BCTM), 2011 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-61284-165-6
DOI :
10.1109/BCTM.2011.6082754
