Bipolar differential cell with improved bandwidth performance

Author

Balsi, Marco ; Centurelli, Francesco ; Pennisi, Salvatore ; Trifiletti, Alessandro

Author_Institution

Dipt. di Ingegneria Elettronica, Universita "La Sapienza", Roma, Italy

Volume

3

fYear

2002

fDate

2002

Firstpage

1055

Abstract

In this paper we present a novel technique to implement a differential cell with extended bandwidth. The solution exploits an auxiliary differential amplifier used in unity closed-loop gain, which regenerates the input signal, thereby allowing the reduction of the input capacitance of the main differential cell. Compared to a conventional topology with the same DC gain, the proposed one allows a maximum bandwidth improvement of a factor of two. Simulations using a SiGe bipolar technology in excellent agreement with expected results are also given.

Keywords

Ge-Si alloys; bipolar analogue integrated circuits; capacitance; circuit simulation; differential amplifiers; integrated circuit design; integrated circuit modelling; network topology; semiconductor materials; DC gain; SiGe; SiGe bipolar technology; auxiliary differential amplifier; bandwidth performance; bipolar differential cell; cell topology; differential cell input capacitance; input signal regeneration; simulations; unity closed-loop gain; Bandwidth; Capacitance; Differential amplifiers; Feedback loop; Frequency; Negative feedback; Negative feedback loops; Optical amplifiers; Pulse amplifiers; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2002. 9th International Conference on

Print_ISBN

0-7803-7596-3

Type

conf

DOI

10.1109/ICECS.2002.1046432

Filename

1046432