请各位给个纯运放的电路谢谢，我推M1

两颗心

大家好，刚买了M1但我的MD推的不是很好，所以想自己做个简单的纯运放二房，谢谢大家请提供比较好的纯运放电路！

Bunny

贴个图给您吧。。。


其实说认真的， 运放电路的是最最最简单的了， 偶就是因为懒才特别喜欢运放。

同乐同乐。。。实验的时候先用炮灰级的OP例如 TL071/081/NE5534/CA3140,
不然接错线就不爽了。

江南闲人

这个电路我认为推力不够，不过可以玩玩试试，对付M1可能已经够了。

machcat

我从PHILIP的DVD机上拆了一个，是TCA0372的

mscdex

这么简单的电路？？？？仅仅靠运放来工作？？？？会出好声么？？？？如果声音不错，可以用来做便鞋的耳放了

深海

http://www.hellocq.net/~swl/lt/attachment.php?s=&postid=1139

[此贴子已经被作者于2002-12-25 11:03:07编辑过]

Bunny

以下是引用mscdex在2002-12-24 12:00:00的发言：
这么简单的电路？？？？仅仅靠运放来工作？？？？会出好声么？？？？如果声音不错，可以用来做便鞋的耳放了

       AD811是比较强劲的顶级视放之一。     


PRODUCT DESCRIPTION
====================
The AD811 is a wideband current-feedback operational amplifier,
optimized for broadcast quality video systems. The –3 dB
bandwidth of 120 MHz at a gain of +2 and differential gain and
phase of 0.01% and 0.01° (RL = 150 W) make the AD811 an
excellent choice for all video systems. The AD811 is designed to
meet a stringent 0.1 dB gain flatness specification to a bandwidth
of 35 MHz (G = +2) in addition to the low differential
gain and phase errors. This performance is achieved whether
driving one or two back terminated 75 W cables, with a low
power supply current of 16.5 mA. Furthermore, the AD811 is
specified over a power supply range of ±4.5 V to ±18 V.
16-Lead SOIC (R-16) Package 20-Lead SOIC (R-20) Package


FEATURES
============
High Speed
----------
140 MHz Bandwidth (3 dB, G = +1)
120 MHz Bandwidth (3 dB, G = +2)
35 MHz Bandwidth (0.1 dB, G = +2)
2500 V/ms Slew Rate
25 ns Settling Time to 0.1% (For a 2 V Step)
65 ns Settling Time to 0.01% (For a 10 V Step)

Excellent Video Performance (RL =150 V)
0.01% Differential Gain, 0.018 Differential Phase
Voltage Noise of 1.9 nV諬z

Low Distortion: THD = –74 dB @ 10 MHz
Excellent DC Precision
3 mV max Input Offset Voltage

Flexible Operation
Specified for +/-5 V and +/-15 V Operation
62.3 V Output Swing into a 75 V Load (VS = 65 V)


APPLICATIONS
=============
Video Crosspoint Switchers, Multimedia Broadcast
Systems
HDTV Compatible Systems
Video Line Drivers, Distribution Amplifiers
ADC/DAC Buffers
DC Restoration Circuits
Medical—Ultrasound, PET, Gamma and Counter Applications

***The AD811 is also excellent for pulsed applications where transient
response is critical. It can achieve a maximum slew rate of
greater than 2500 V/ms with a settling time of less than 25 ns to
0.1% on a 2 volt step and 65 ns to 0.01% on a 10 volt step.
The AD811 is ideal as an ADC or DAC buffer in data acquisition
systems due to its low distortion up to 10 MHz and its wide
unity gain bandwidth. Because the AD811 is a current feedback
amplifier, this bandwidth can be maintained over a wide range
of gains. The AD811 also offers low voltage and current noise of
1.9 nV/諬z and 20 pA/諬z, respectively, and excellent dc accuracy
for wide dynamic range applications.
GAIN – dB

markamp

你的M1什么价？
AD811的Rf取500欧，输入电阻可适当大些，用10k都没问题，这样匹配方便，当然失真会增大少许，另外可取销Rg。

[此贴子已经被作者于2002-12-25 22:31:09编辑过]

江南闲人

深海兄这个电路可行，我做过，电源要下功夫，正负一定要搞准。基本上什么运放出什么声。

两颗心

以下是引用深海在2002-12-25 11:03:00的发言：
http://www.hellocq.net/~swl/lt/attachment.php?s=&postid=1139

[此贴子已经被作者于2002-12-2511:03:07编辑过]

IC用5532能换么？

sadeness

能

markamp

注意，OPA2134在作同向放大时，反向端的输入阻抗不能大于2k，否则可能不稳定，
建义R3和R5分别改为1k和10k。

北斗

有一些台式CD机就是这么干的。