TY - GEN
T1 - On the scaling limits of low-frequency noise in SiGe HBTs
AU - Johansen, J.
AU - Jin, Z.
AU - Cressler, J. D.
AU - Cui, Y.
AU - Niu, G.
AU - Liang, Q.
AU - Rieh, J. S.
AU - Freeman, G.
AU - Ahlgren, D.
AU - Joseph, A.
N1 - Funding Information:
This work was supported by a Fulbright Fellowship (J. Johansen), the Semiconductor Research Corporation, IBM, and the Georgia Electronic Design Center at Georgia Tech. The wafers were fabricated at IBM Microelectronics, Essex Junction, VT.
PY - 2003
Y1 - 2003
N2 - Low-frequency noise (LFN) is up-converted to phase noise through the nonlinearities of transistors, placing a fundamental limit on the achievable spectral purity of communications systems. One unique merit of SiGe HBTs is that they can simultaneously provide very small broadband and 1/f noise, giving them an advantage over scaled CMOS and III-V devices for high-frequency wireless building blocks limited by phase noise (e.g., oscillators and mixers). A statistical variation in the LFN spectra of small SiGe HBTs has recently been reported [1], however, and a qualitative explanation was offered which assumes a reduction in the number of noise-generating G/R traps as the device emitter area decreases [1,2]. We present, for the first time, LFN results on SiGe HBTs with fTs of 210 GHz and 350 GHz, compare geometrical scaling-induced small-size effects in 1/f noise with previous SiGe technology generations, and use 2D simulations of 1/f noise to better understand the scaling limitations of noise in SiGe HBTs.
AB - Low-frequency noise (LFN) is up-converted to phase noise through the nonlinearities of transistors, placing a fundamental limit on the achievable spectral purity of communications systems. One unique merit of SiGe HBTs is that they can simultaneously provide very small broadband and 1/f noise, giving them an advantage over scaled CMOS and III-V devices for high-frequency wireless building blocks limited by phase noise (e.g., oscillators and mixers). A statistical variation in the LFN spectra of small SiGe HBTs has recently been reported [1], however, and a qualitative explanation was offered which assumes a reduction in the number of noise-generating G/R traps as the device emitter area decreases [1,2]. We present, for the first time, LFN results on SiGe HBTs with fTs of 210 GHz and 350 GHz, compare geometrical scaling-induced small-size effects in 1/f noise with previous SiGe technology generations, and use 2D simulations of 1/f noise to better understand the scaling limitations of noise in SiGe HBTs.
UR - http://www.scopus.com/inward/record.url?scp=4043090768&partnerID=8YFLogxK
U2 - 10.1109/ISDRS.2003.1271972
DO - 10.1109/ISDRS.2003.1271972
M3 - Conference contribution
AN - SCOPUS:4043090768
T3 - 2003 International Semiconductor Device Research Symposium, ISDRS 2003 - Proceedings
SP - 12
EP - 13
BT - 2003 International Semiconductor Device Research Symposium, ISDRS 2003 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - International Semiconductor Device Research Symposium, ISDRS 2003
Y2 - 10 December 2003 through 12 December 2003
ER -