Преносен аудио засилувач за слушалки.
Карактеристики:
Current drain: 35mA per channel with 32 Ohms impedance headphones. Much less with higher impedance loads
Output voltage: Above 2V peak-to-peak on all loads
Sensitivity: 90mV RMS input for 2V peak-to-peak output
Frequency response: Flat from 30Hz to 20KHz
Total harmonic distortion 1KHz & 10KHz: Below 0.05% on 32 to 600 Ohms load and up to 1.5V peak-to-peak output.
Шема:
Компоненти:
R1 = 10K 1/4W Resistor
R2 = 100K 1/4W Resistor
R3 = 68K 1/4W Resistor
R4 = 1K5 1/4W Resistor
R5 = 3K3 1/4W Resistor
R6 = 330R 1/4W Resistor
R7 = 4K7 1/4W Resistor
R8 = 2R2 1/4W Resistor
C1 = 1µF 63V Polyester Capacitor
C2 = 100µF 25V Electrolytic Capacitor
C3 = 470µF 25V Electrolytic Capacitor
Q1 = BC239C 25V 100mA NPN High-gain Low-noise Transistor
Q2 = BC337 45V 800mA NPN Transistor
Q3 = BC327 45V 800mA PNP Transistor
J1 = Stereo 3mm. Jack socket
SW1 = SPST Switch
B1 = 3V Battery (two 1.5V AA or C cells in series)
