cfo wrote:
On Mon, 26 Mar 2012 08:11:16 +1300, Bruce Griffiths wrote:
Bruce Griffiths wrote:
A circuit schematic for a current feedback triple with reasonably low
noise and distortion is attached.
Bruce
Thanx Bruce
I'm an analog noob , so i have some questions.
If i multiply that schematic by 8 , could i then just add the Tbolt input
at all V1's ?
The input capacitance may be a little high, however one could
approximately compensate for it in a narrow band application.
Should R15 + C11 + C12 also be multiplied ?
One RC decoupling circuit like this for each amplifier is advisable to
reduce crosstalk.
Is V2 a 12v supply (i suppose so) ?
Yes the schematic was taken from an LTSpice simulation.
Could i replace the 2N3904 with BC850LT1 (smd) , and the 2N3906 with
BC856ALT1 (smd) , else i have some BC337/BC327 - TO92 (non smd)
No, the input and output capacitances of those transistors are probably
a little too high.
Would one chan work on a perf-board with wires (proof of concept) , or
would it be to "RF sensitive" ?
Its usually better to construct it over a ground plane "rats nest" style.
A piece of unetched PCB works well.
regards
CFO
Bruce
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