📄 e_ckt13.htm.mht
字号:
From: <Saved by Mozilla 5.0 (Windows; en-US)>
Subject: Square wave oscillator (1)
Date: Fri Oct 05 2007 19:00:02 GMT+0800
MIME-Version: 1.0
Content-Location: http://www.interq.or.jp/japan/se-inoue/e_ckt13.htm
Content-Type: multipart/related;
boundary="----=_NextPart_000_0000_0D980ABB.74BE1275";
type="text/html"
X-MAF: Produced By MAF MHT Archive Handler V0.4.1
This is a multi-part message in MIME format.
------=_NextPart_000_0000_0D980ABB.74BE1275
Content-Type: text/html
Content-Transfer-Encoding: quoted-printable
Content-Location: http://www.interq.or.jp/japan/se-inoue/e_ckt13.htm
<html><head>
<meta http-equiv=3D"content-type" content=3D"text/html;charset=3DWindows-125=
2">
<meta name=3D"GENERATOR" content=3D"HOTALL Ver.7.0iW"><title>Square wave osc=
illator (1)</title>
<style type=3D"text/css">
<!--
A:hover {
color : #ff0000;
text-decoration : bold;
}
-->
</style></head><body allinonesearch_highlight=3D"off" background=3D"index_fi=
les/wpckt1.gif">
<basefont size=3D"2" face=3D"Verdana, Arial, Helvetica">
<p>
[<a href=3D"http://www.interq.or.jp/japan/se-inoue/e_menu.htm">Menu</a>]>=
[<a href=3D"http://www.interq.or.jp/japan/se-inoue/e_ckt.htm">Electronic cir=
cuit beans collection</a>]<br>
</p><div align=3D"center"><br>
<font color=3D"#800000" size=3D"6">Square wave oscillator (1)</font><br>
<img src=3D"index_files/line_001.gif" alt=3D"" align=3D"bottom" height=3D"13=
" width=3D"454"><br>
<br>
<table border=3D"1">
<tbody><tr>
<td><img src=3D"index_files/ckt13_1.gif" alt=3D"" align=3D"bottom" height=3D=
"160" width=3D"262"></td>
</tr>
</tbody></table><br>
<br>
<table bgcolor=3D"#ffffff" cellpadding=3D"10" width=3D"95%">
<tbody><tr>
<td>
<font size=3D"2">In this page, I introduce the square wave oscillator which =
used the Schmitt inverter circuit which was made with the CMOS.</font><br>
<font size=3D"2">The Schmitt inverter circuit has the hysteresis
characteristic. The circuit to introduce is the oscillation circuit
which used this characteristic.</font><br>
<font size=3D"2">By the hysteresis characteristic, the voltage which
becomes the H level with the input voltage of the inverter rising from
0 V (Voltage that the output becomes 0 V) and the voltage which becomes
the L level, descending from +5 V (Voltage that the output becomes +5
V) are different.</font><br>
<br>
<div align=3D"center"><img src=3D"index_files/ckt13_2e.gif" alt=3D"" align=
=3D"bottom" height=3D"169" width=3D"292"><br>
<br>
<font size=3D"2">When using 74HC14, the rough estimate value of the oscillat=
ion frequency can be calculated by the following formula.</font><br>
<br>
<table cellpadding=3D"10">
<tbody><tr>
<td bgcolor=3D"#dfffff">
<div align=3D"center"><font color=3D"#ff0000" size=3D"5">f =3D 1/T =3D 1/CR<=
/font><br></div>
<br>
<div align=3D"right"><table>
<tbody><tr>
<td><font size=3D"2">f</font></td><td><font size=3D"2">:</font></td><td><fon=
t size=3D"2">The oscillation frequency (Hz)</font></td>
</tr>
<tr>
<td><font size=3D"2">T</font></td><td><font size=3D"2">:</font></td><td><fon=
t size=3D"2">The oscillation period (Second)</font></td>
</tr>
<tr>
<td><font size=3D"2">C</font></td><td><font size=3D"2">:</font></td><td><fon=
t size=3D"2">The capacitor (F)</font></td>
</tr>
<tr>
<td><font size=3D"2">R</font></td><td><font size=3D"2">:</font></td><td><fon=
t size=3D"2">The resistor (ohm)</font></td>
</tr>
</tbody></table></div></td>
</tr>
</tbody></table><br>
<br>
<a href=3D"http://www.interq.or.jp/japan/se-inoue/e_datasheet.htm#74hc14"><f=
ont size=3D"2">Data sheet for 74HC14</font></a><br>
<br>
<hr><br>
<table cellpadding=3D"10">
<tbody><tr>
<td><a href=3D"http://www.interq.or.jp/japan/se-inoue/e_ckt13_4.htm"><img sr=
c=3D"index_files/ckt13_1.jpg" alt=3D"" align=3D"bottom" height=3D"244" width=
=3D"266"></a></td><td>
<img src=3D"index_files/bol_pp.gif" alt=3D"" align=3D"bottom" height=3D"16" =
width=3D"16"><font size=3D"5"><b> </b></font><a href=3D"http://www.interq.or=
.jp/japan/se-inoue/e_ckt13_1.htm"><font size=3D"4">Pattern drawing</font></a=
><br>
<br>
<img src=3D"index_files/bol_pp.gif" alt=3D"" align=3D"bottom" height=3D"16" =
width=3D"16"><font size=3D"5"><b> </b></font><a href=3D"http://www.interq.or=
.jp/japan/se-inoue/e_ckt13_2.htm"><font size=3D"4">Operation explanation</fo=
nt></a><br>
<br>
<img src=3D"index_files/bol_pp.gif" alt=3D"" align=3D"bottom" height=3D"16" =
width=3D"16"><font size=3D"5"><b> </b></font><a href=3D"http://www.interq.or=
.jp/japan/se-inoue/e_ckt13_3.htm"><font size=3D"4">Performance evaluation</f=
ont></a></td>
</tr>
</tbody></table><br>
<br>
<img src=3D"index_files/blank_1.gif" alt=3D"" align=3D"bottom" height=3D"11"=
width=3D"11"></div></td>
</tr>
</tbody></table><br>
<br>
<img src=3D"index_files/blank_1.gif" alt=3D"" align=3D"bottom" height=3D"11"=
width=3D"11"><br></div><p></p></body></html>
------=_NextPart_000_0000_0D980ABB.74BE1275
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: index_files/blank_1.gif
R0lGODlhCwALAIAAAAAAAP///yH5BAEAAAEALAAAAAALAAsAAAIKjI+py+0Po5yhAAA7AA==
------=_NextPart_000_0000_0D980ABB.74BE1275
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: index_files/ckt13_2e.gif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------=_NextPart_000_0000_0D980ABB.74BE1275
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: index_files/bol_pp.gif
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -