Reference current source of low-temp. coefficient and low power-supply-voltage coefficient
Title：
Reference current source of low-temp. coefficient and low power-supply-voltage coefficient
Application Number：
 200310100475
Application Date：
 2003/10/17
Announcement Date：
 2004/09/15
Pub. Date：
Publication Number：
 1529216
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G05F 1/46G05F 3/08
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Shi Bingxue, Chen Jiwei, Liao Qing
Key Words：
 Reference current source, low-temp. coefficient, low power-supply-voltage coefficient
Abstract：
 In the power source, a start circuit generates a low voltage, making a constant current generation circuit operate. The start circuit includes: PMOS tube for generating image current, two NMOS tubes constituting current mirror circuit, a NMOS tube for starting a constant current generation circuit, a resistance for controlling on/off of NMOS tube. The constant current generation circuit includes: two PMOS tubes constituting current mirror circuit, capacitance for preventing parasitic oscillation in circuit, PNP bipolar transistor for generating two emitter junction voltages, and operational amplifier for carrying out differentiate magnification for voltage drop. The reference current source realizes temperature stable output current, possessing very low temperature coefficient, without need of external part an external signal, low usable area and low power consumption.
Claim：
Priority：
PCT：
LegalStatus：

Recommend this patent:
1 2 3 4 5
Average ( 0 votes):
                                                                          Recommended Patents>>

Relevancy information



Other Patents of Same Inventor

Direct current level converter
Virtual earth circuit in current detector of microcomputer multiphase switch power source
Multiple phase switch power source using active and slave current uniform microprocessor
Circuit for eliminating signal amplitude mismatch on orthogonal signal path
Low converter possessing high symmetricity and linearity
Integrated radio frequency phase locked loop type frequency synthesizer
Low-Volage high-linearity radio-frequency amplifier for on-chip impedance match



News & Events More>>

Last Update  
2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







Copyright 2008-2015 All Rights Reserved Patent License of China.      Designed by Easygo