TA2042F

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA2042F Dual Pre Amplifier With A Music Search For Auto Reverse Car Stereo The TA2042F is dual pre amplifier with a music interval detection circuit for auto reverse car stereo. This IC contains dual amplifier, forward / reverse control switch and metal / normal tape equalizer control switch. Features · Low noise: VNI = 0.7µVrms (typ.) (Rg = 620Ω, BW = 20~20kHz, NAB) · No input coupling capacitor · High voltage gain: GVO = 100dB (typ.) (VCC = 9V, f = 1kHz) Weight: 0.31g (typ.) · Built−in forward / reverse control switch. · Built−in selecting the sensitivity of the music interval detection circuit. · Built−in muting function. · Operating supply voltage: VCC (opr) = 6~15V TA2042F 1 2002-10-30 Block Diagram TA2042F 2 2002-10-30 Application Information 1. Forward, reverse select switch (1) Threshold voltage Pin(20) is coupled to the base of Q1 (PNP-Tr) as shown in Fig.1. The recommended forward, reverse select circuit is shown in Fig.2. TA2042F 2. Equalizer control switch Pin(21) is coupled to the base of Q2 (PNP-Tr) as shown in Fig.3. 3. Mute control switch Pin(22) is coupled to the base of Q3 (PNP-Tr) through 10kΩ resistance as shown in Fig.4. 3 2002-10-30 4. Sensitivity select switch Pin(23) is to select the sensitivity of music search. 5. Music search system (1) Sensor amp. TA2042F 4 2002-10-30 TA2042F This portion is to amplify the voltage between some recorded music signal and next one. Vo...