A highly accurate BiCMOS cascode current mirror for wide output voltage range

Author

Yang, Byung Do ; Kim, Jang Su ; Yun, Jin Kuk ; Lee, Yong Kyu ; Lee, Jee Sue

Author_Institution

VLSI Circuit & Syst. Lab., Chungbuk Nat. Univ., Cheongju

fYear

2008

fDate

18-21 May 2008

Firstpage

2314

Lastpage

2317

Abstract

In this paper, a highly accurate wide swing BiCMOS cascode current mirror is proposed. It uses the base-current compensated BJT current mirror. It increases both output impedance and output voltage range by using the npn-NMOS cascode instead of the NMOS-NMOS cascode. The npn transistor copies the input current and the NMOS transistor increases the output impedance for the accurate current mirroring. The proposed current mirror achieves highly constant current for wide output voltage range. Simulation results were verified with measurements performed on a fabricated chip using a 5/16 V 0.5 um BCD process. It has only -2.5~1.0% current error for 0.3~16 V output voltage range.

Keywords

BiCMOS analogue integrated circuits; bipolar transistors; current mirrors; electric impedance; low-power electronics; BiCMOS cascode current mirror; base-current compensated BJT current mirror; npn-NMOS cascode; output impedance; wide output voltage range; Analog integrated circuits; BiCMOS integrated circuits; Current supplies; Impedance; MOSFETs; Mirrors; Performance evaluation; Semiconductor device measurement; Very large scale integration; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

978-1-4244-1683-7

Electronic_ISBN

978-1-4244-1684-4

Type

conf

DOI

10.1109/ISCAS.2008.4541917

Filename

4541917