別在意, 小弟最近也比較忙, 有空再回答就行了, 反正只要能完成, 個人就很高興了, 興趣就是好玩就好, 有壓力樂趣就少一半了
下面是討論區建議改的一些參數, VR部分個人看不懂, 有什麼建議的嗎?
VR 3.3KR
第一級部分,應該是R2, R1, C1
第二級的輸出部分應該是R5, R0, C2
R1 1KR
R0 220R--> 100R
C3 100pF-->22pF

因為個人似乎不需要這麼大的增益,目前看起來有三個方向可以進行
第一個是VR
第二個是R10的電阻增大,讓G=2
第三個是Power的電壓降低, 讓output Vrms直接降低
目前是頃向VR不裝, 給定電阻, 然後G=2, 電壓往下拉一些~12V.
這樣不知是否可行?
Low noise preamplification is usually performed in the non-
inverting mode (see Figure 39). For lowest noise, the equivalent
resistance of the feedback network should be as low as possible.
The 30 mA minimum drive current of the AD797 makes it easier
to achieve this. The feedback resistors can be made as low as
possible, with consideration to load drive and power consumption.
Table 6 provides some representative values for the AD797 when
used as a low noise follower. Operation on 5 V supplies allows
the use of a 100 Ω or less feedback network (R1 + R2). Because
the AD797 shows no unusual behavior when operating near its
maximum rated current, it is suitable for driving the AD600/
AD602 (see Figure 51) while preserving low noise performance.
Optimum flatness and stability at noise gains >1 sometimes require
a small capacitor (C L ) connected across the feedback resistor (R1 of
Figure 39). Table 6 includes recommended values of C L for several
gains. In general, when R2 is greater than 100 Ω and C L is greater
than 33 pF, a 100 Ω resistor should be placed in series with C L .
Source resistance matching is assumed, and the AD797 should not
be operated with unbalanced source resistance >200 kΩ/G.