constant gm & constant current bias circuit

johnjohn

想請問各位先進們
偏壓電路的設計 該看哪些書或是哪幾篇paper呀?!
constant gm bias circuit的設計在書上常見到
! z8 h  r* t+ I8 W+ j& e但constant current的就找不到了

6 F6 n7 @4 d+ I0 h7 c此外，請問在設計偏壓電路時，應該掌握哪些要領才能抵抗PVT的飄移呀
, U8 w) O: @% G; G+ |謝謝先進們的回答^^

finster

Razavi的Design of Analog CMOS Integrated Circuits"
Chapter 11 "Bandgap References"
裡面就有詳述constant gm circuit以及bandgap reference circuit設計要項

4 v0 T- e* a; E  U至於constant current,因為電路會因為製程變異(process corner),工作電壓和溫度這三項變異因素
故而很難設計出constant current

hi.china59

Please use current mode bandgap, whose current is independent of process, voltage and temperature.
For more detailed information, please visit the following websites
http://www.eetop.cn/bbs/thread-198482-1-1.html
http://www.eetop.cn/bbs/thread-184913-1-1.html

This report includes detailed Hspice simuation and netlist files.

/ [. K" X& x" c, I) e9 kContents
  1. OP schematic sheet and netlist
  2. Bandgap reference schematic sheet and netlist
  3. Bandgap reference circuit: temperature vs. Vref simulation
. ~; \  \8 s' l0 v; o$ g  4. Bandgap reference circuit: Transient simulation
* I8 @6 V+ @9 g7 Y7 F" N3 E  5. Bandgap reference PSRR simulation
2 C4 n) A1 E9 ]% ?+ P; a! m3 U" V
File name discription
  1. bandgap.sp: temperature vs. reference voltage simulated file
" m$ o  q* S  o. s$ X5 a  2. bandgap_tran.sp: Bandgap tranient simulated file
  3. bandgap_psrr.sp: Bandgap PSRR simulated file
1 u+ k: a4 i& G$ k/ ^
Reference paper:  Hironori Banba “A CMOS Bandgap Reference Circuit with Sub-1-V Operation” IEEE J. Solid-State Circuits, vol. 34, NO. 5, pp.670-673, MAY 1999

For analytical solution of Banba Bandgap Reference circuit, please visit the following website
http://www.eetop.cn/bbs/thread-184913-1-1.html
! F5 [- l; @6 H( o4 R3 _" j1 @The original solution of Razavi's Problem 11.17 and 11.18 are wrong!  Page 402~403

johnjohn

恩 好的 謝謝樓上兩位先進的指教^^