[SI-LIST] Re: a problem in simulate crystal oscillator
- From: "zyq" <kluivert19@xxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sat, 10 Jul 2004 10:06:43 +0800 (CST)
Thank you very much for your reply. I know my description is no good so here
is my sp file. And i mean that when the xi2 is added in the circuit.the voltage
range of out and 3 will be small. And out1 will be aout 2.9-2.1 which is almost
the same as the voltage range of out when remove xi2. Can you tell me that's
why?
best regards
** Circuit Description **
* 3.579545Mhz color burst, AT cut, parallel resonant, Q=25000,
.subckt colorburst_crystal 1 2
l 1 11 0.0555779237 IC=1uA
cs 11 12 3.56169600e-014
r 12 2 50
cp 1 2 8.90424001e-012
.ends
.global gnd vdd
** Main Circuit **
* power supplies
Vpower vdd gnd DC 5V
* oscillator circuit
.subckt inv a y
Mp y a vdd vdd pmos_transistor L=5u W=200u
Mn y a gnd gnd nmos_transistor L=5u W=100u
.ends
Rf 2 3 10Meg
R1 2 4 75k
Xtal 3 4 colorburst_crystal
C1 3 0 10pF IC=2.5V
C2 4 0 10pF IC=2.5V
.subckt inv1 a y
mn1 y a gnd gnd nmos_transistor w=2u l=0.5u
mp2 y a vdd vdd pmos_transistor w=4.0u l=0.5u
.ends
.subckt inv2 a y
mn1 y a gnd gnd nmos_transistor w=2u l=0.5u
mp2 y a vdd vdd pmos_transistor w=4.0u l=0.5u
.ends
xI0 3 2 / inv
xI1 2 out / inv1
*xI2 out out1 / inv2
* model statement
.model pmos_transistor PMOS (kp=10u Vto=-1V lambda=0.04)
.model nmos_transistor NMOS (kp=20u Vto=+1V lambda=0.04)
** Analysis Requests **
.options limpts=100000 itl5=0 opts numdgt=7
.width out=80
* use the DC bias point as the initial conditions for the oscillator
.TRAN 20ns 20ms 0.0199972 20ns UIC
*.tran 20ns 20ms UIC
.FOUR 3.579MegHz
** Output Requests **
.PRINT TRAN
.option post
*.probe
.end
yqzheng
----------------------------------------------
[ƯÁÁMM]ÐÎÏó´óʹÌùͼ´óÈü¿ªÊ¼Í¶Æ±À²
http://free.21cn.com/huodong/plmm/vote.html
Òƶ¯¿¨À²ok£¬¶À¼ÒÊÔ³ª
http://mms.21cn.com/ring/ring.jsp
±»³ÇÊÐÀÓÓ¡µÄÅ®ÈË µ¥ÉíÇé¸è³ª¶à¾Ã£¿
http://news.21cn.com/social/
21CNÉÌÎñÓÊÏäÎåÒ»8ÕÛÓŻݣ¬·áºñ½±Æ·µÈÄãÄÃ
http://mail.21cn.com/huodong/0405/business/detail.html
ÆóÒµÓÊÏäÏÄÈÕ´óÓŻݣ¬ÊÖ»ú¡¢MP3¼´Ê±ËÍ
http://mail.21cn.com/huodong/0405/corpmail/
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
