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| Fig. 2(b) --- A2 & A3 LAYOUTS |
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R5
C5 |
200Ω Choose to transmit widest pulse (FS once) |
For AC coupling provides base current to A2 in + |
| R6 |
FS once |
lowers gain of A2 |
| C6 |
FS once 1-3pF |
slows down A2 |
| C7 |
FS once 1-3pF |
slows down A2 (compensates for input capacitance) |
| R8-C8 |
FS once |
removes overshoots |
| R9 |
FS once |
increases A2 gain |
| R10 |
500K pot |
A2 DC adj |
| RV3-CV3 |
FS once |
recovery net |
DT2
RT3
RT4 |
FS once
tempco adjust |
A2 temp .... adj if necessary |
| R11 |
160 Ω |
A2 in + base current (AC coupling only) |
| C9 |
FS once |
Speedup cap for A2 |
| C10 |
FS once |
AC couple A2 to A3 |
| C11 |
FS once |
A3 slow down |
| R12-C12 |
FS once |
overshoot remover |
| R13 |
FS once |
A3 gain adj (lowers gain) |
| R14 |
FS once |
A3 gain increase |
| C13 |
FS once |
A3 speedup |
| R15 |
500K pot |
A3 DC offset adj |
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7 February 20, 2008 |
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