요청 내용
“Draw a 9 V 2N5457 piezo preamp with gate bias, source resistor and bypass capacitor, drain resistor, input and output coupling capacitors, a 100 kΩ volume potentiometer, and a 10 kΩ tone potentiometer.”
그렇다면Change the input capacitor to 22 nF.Change the volume potentiometer to 250 kΩ.
이 도면에 담긴 내용
그 이면의 의사결정을 읽어 보세요.
01
JFET common source stage for high input impedance and gain
02
Passive volume control using a voltage divider
03
Passive tone control with RC low-pass filter
When building a preamp for piezo pickups that require high input impedance (1MΩ) and variable output level.