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PNP transistor

PNP transistor system PNP transistor system

CMOS integated circuit

The 4093 CMOS integated circuit using BC547 , BC548 The 4093 CMOS integated circuit Parts R1 180 KOhm R2 12 KOhm R3, 8 47 KOhm R4 3,9 KOhm R5, 6, 16 10 KOhm R7, 10, 12, 14, 17   100 K R9, 11 1 MOhm R13, 15 3,3 KOhm C1, C6 10uF/16V C2 47uF/16V C3 […]

NOISE REDUCTION PROCESSOR

NOISE REDUCTION PROCESSOR DOLBY NOISE REDUCTION PROCESSOR circuit using KA22712 DOLBY B-TYPE NOISE REDUCTION PROCESSOR The KA22712 is a monolithic integrated circuit designed for in Dolby* B-type noise reduction systems. FEATURES Few external components. Low quiescent circuit current (Typ Iccq=4.5mA) High crosstalk rejection ratio. Built in NR-switch, REC/PB-switch. Recommended supply voltage: Vcc=6.5V~16V. DOLBY  NOISE REDUCTION […]

Portable guitar headphone circuit

Portable guitar headphone circuit I built a portable headphone amplifier for testing purposes Headphone amp circuit using : R1 = 10K R2 = 100K R3 = 68K R4 = 1.5K R5 = 3.3K R6 = 330R R7 = 4K7 R8 = 2.2R C1 = 1µF-63V C2 = 100µF-25V C3 = 470µF-25V Q1 =  BC239C Q2 […]

STK Audio IC

stk audio ic 45W Audio Amplifier Circuit using STK055

Audio spectrum analyzer circuit

Audio spectrum analyzer circuit audio spectrum analyser circuit Audio spectrum analyzer circuit using UAA180 Audio spectrum analyzer circuit Audio spectrum analyzer circuit

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