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
但constant current的就找不到了

! y7 I' L# s% S# t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
* I6 e1 O( f' }, M) R: N  s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
- w7 x  y! \; `& P5 n+ X
; ^2 E. _7 ]# D1 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
' ]7 |0 r  |$ a: j3 M; \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
6 F, y  q5 E% {- x+ I" @http://www.eetop.cn/bbs/thread-198482-1-1.html
http://www.eetop.cn/bbs/thread-184913-1-1.html
# T( d/ Y5 }% k8 ]
This report includes detailed Hspice simuation and netlist files.

- W9 j8 z2 `( s5 S# X: D2 p( v8 nContents
  1. OP schematic sheet and netlist
  2. Bandgap reference schematic sheet and netlist
, Q+ W! j0 E0 c3 ?! ]  3. Bandgap reference circuit: temperature vs. Vref simulation
  b" x2 D2 |) d7 ]( ^  4. Bandgap reference circuit: Transient simulation
$ {) a9 b1 _3 s) o; K  5. Bandgap reference PSRR simulation

File name discription
6 f4 t1 {5 G! |% @  E6 h" n  1. bandgap.sp: temperature vs. reference voltage simulated file
; q6 B5 V* x' w7 D9 [. l+ e  2. bandgap_tran.sp: Bandgap tranient simulated file
  3. bandgap_psrr.sp: Bandgap PSRR simulated file

2 x  j& d1 B  ~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

$ E# H5 \0 u4 [6 ?6 ^For analytical solution of Banba Bandgap Reference circuit, please visit the following website
5 ?8 @4 c& E: m8 shttp://www.eetop.cn/bbs/thread-184913-1-1.html
% v3 }  q  ^8 Z8 DThe 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^^