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TA2042F

Toshiba Semiconductor
Part Number TA2042F
Manufacturer Toshiba Semiconductor
Description DUAL PRE AMPLIFIER
Published Dec 7, 2005
Detailed Description TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA2042F Dual Pre Amplifier With A Music Search For Auto Rev...
Datasheet PDF File TA2042F PDF File

TA2042F
TA2042F

Overview
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.
Voltage gains are: For play mode: GV (play) = 20log 30kW + 100 + RNF3 100 + RNF3 (dB) For F.
F.
mode: GV (F.
F.
) = 20log 30kW + 220 + RNF4 220 + RNF4 (dB) Lower side cut off frequency: For play mode: fL(play) = 1 2pCNF3 (100 + RNF3 ) (Hz) For F.
F.
mode: fL (F.
F.
) = 1 2pCNF4(220 + RNF4 ) (Hz) This RNF3 and RNF4 value decide the sensitivity of music searching, but be careful below as table.
Sensitivity ( = GV (play), GV (F.
F.
) Too high Too low Influence Easy to misoperat...


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