話筒放大電路圖一:
話筒放大電路圖二:
放筒放大器電路圖三:
簡單實用的放筒放大器電路圖四:
指標:
Frequency response: 20 Hz to 20 kHz +-1dB
Noise level (A-weighted): -85 dBm
Amplification: 35 dB
元件清單:
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
元件清單:
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歐話筒平衡輸入放大電路圖:
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