Title :
Very high-speed BJT buffer for track-and-hold amplifiers with enhanced linearity
Author :
Aksin, Devrim Yilmaz ; Maloberti, Franco
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
This paper presents new design techniques to enhance low and high frequency track mode linearity of the switched emitter follower structure used in very high-speed track-and-hold amplifiers. Simulations using a 0.8 μm 5 V SiGe BICMOS process and symbolic harmonic distortion analysis verify the performance of the proposed techniques. Analysis results show a third harmonic better than -105 dB with 1.5 Vpp, at 100 MHz for a 1.6 pF hold capacitor.
Keywords :
BiCMOS analogue integrated circuits; Ge-Si alloys; analogue processing circuits; circuit simulation; differential amplifiers; harmonic distortion; integrated circuit design; sample and hold circuits; semiconductor materials; very high speed integrated circuits; 0.8 micron; 1.6 pF; 100 MHz; 5 V; SiGe; SiGe BICMOS very high-speed track-and-hold amplifiers; analog input signal processing; design techniques; differential structures; enhanced linearity; high frequency track mode linearity; low frequency track mode linearity; simulations; switched emitter follower structure; symbolic harmonic distortion analysis; third harmonic; very high-speed BJT buffer; Analytical models; BiCMOS integrated circuits; Capacitors; Frequency; Germanium silicon alloys; Harmonic analysis; Harmonic distortion; Linearity; Performance analysis; Silicon germanium;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010767
