我也不懂 亂翻了一下google 還是看不懂
亂猜的 可能的是open loop gain
[url]http://www-k.ext.ti.com/srvs/cgi-bin/webcgi.exe?Company={5761bcd8-11f5-4e08-84e0-8167176a4ed9},kb=analog,case=32538,new[/url]
β, Beta, or feedback attenuation factor in an op amp circuit
Problem:
What is β, Beta, or feedback attenuation factor in an op amp circuit?
Solution:
β is the ratio of the feedback signal to the output signal.
In a simple Inverting Amplifier configuration, ? is
β = Rin / (Rin + Rf)
Therefore, in a Unity Gain Inverter, β = 1/2. This would also
be true for a Gain of Two Non-inverting configuration.
See also: What is Loop Gain in an op amp circuit?
這顆OP 是當DC servo 用的
下面有特別提示說別用Bjt Input 的OP 不然可能無法拉回中點
WARNING: Do not use BJT input opamps as they will not satisfactorily zero the offset.
一般常見的fet input OP 大概有opa2132 opa2134 opa2604 tl072 tl082
這部分抓datasheet 來看就會寫在裡面
發表於 : 週五 8月 03, 2012 10:14 pm
