指标:
Frequency response: 20 Hz to 20 kHz +-1dB
Noise level (A-weighted): -85 dBm
Amplification: 35 dB
元件清单:
R1 4.7 kohm
R2 220 kohm
R3 2.2 kohm
R4 120 ohm
C1..C4 10 uF 16V electrolytic
C5 100 uF 16V electrolytic
D1 Red LED
Q1 BC547B (9013)
SW1 on/off switch
Frequency response: 20 Hz to 20 kHz +-1dB
Noise level (A-weighted): -85 dBm
Amplification: 35 dB
元件清单:
R1 4.7 kohm
R2 220 kohm
R3 2.2 kohm
R4 120 ohm
C1..C4 10 uF 16V electrolytic
C5 100 uF 16V electrolytic
D1 Red LED
Q1 BC547B (9013)
SW1 on/off switch
600欧话筒平衡输入放大电路图: