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PDF TA2042F Data sheet ( Hoja de datos )
| Número de pieza | TA2042F | |
| Descripción | DUAL PRE AMPLIFIER WITH A MUSIC SEARCH FOR AUTO REVERSE CAR STEREO | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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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
1 page  
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 misoperation or unstable condition.
Especially, there is influence by pin 2 voltage
variation.
Possible to be oscillation condition
Noise voltage level at tape F. F. mode is larger than play mode's one, and its noise is high frequency. Therefore
the sense amp. for F. F. mode has L. P. F. (low pass filter) circuit.
Its cut off frequency is:
fH (L.P.F.)
=
1
2pCLPF (30kW
//
30kW)
(Hz)
(2) Comparator
This comparator judges whether the signal which is recorded on tape is music or noise.
If the signal level from sensor amp. is more than "Vref", this comparator judges it is "music".
On the other hand, the signal level from sensor amp. is less than "Vref", this judges"noise".
5 2002-10-30
5 Page 
TA2042F
11 2002-10-30
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TA2042F.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TA2042F | DUAL PRE AMPLIFIER WITH A MUSIC SEARCH FOR AUTO REVERSE CAR STEREO | Toshiba Semiconductor |
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