TSH512(2001) Ver la hoja de datos (PDF) - STMicroelectronics

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TSH512
(Rev.:2001)

HiFi stereo/mono infrared transmitter Stereo sub-carrier generator

STMicroelectronics 

TSH512

MULTIMEDIA APPLICATION: HEADSET SIDE

The TSH512 is used in mono to transmit the signal of the Electret Condenser Microphone of the headset.

The circuit is supplied by batteries and the VOX function switches off the output stages to spare energy.

The usual working frequency is 1.7 MHz for infrared mono operation.

TSH511 & 512 supply:

2.3 to 5.5V, 25 mA

Voice transmitted to the PC

HiFi stereo from the PC:

2x 20 mW /16 Ω

TSH511

Audio

amp2

TSH512

LNA + ALC

MIC. BIAS

MIC. BIAS

LNA + ALC

TX2

VOX

TX1

buf fer2

Vcc

SBY

Vcc

LED

buf fer1

1.7 MHz filter

Ban d-pass

Audio

amp1

1.7 MHz

re ject

fi lter

2.3 MHz

Band-pass

fi lter

RX2

LNA

RX1

filter

1.7 MHz

re ject

filter

2.8 MHz

Band-pass

Micropho ne Tx:

1.7 MHz

carrier

photod iode

Stereo Rx:

2.3 & 2.8 MHz

MULTIMEDIA APPLICATION: COMPUTER SIDE

In multimedia application, the TSH512 transmits the HiFi stereo from the PC to the headset.

TSH511 & 512 supply:

2.3 to 5.5V, 24 mA

mono Rx:

1.7 MHz

HiFi stereo

HiFi stereo Tx:

2.3 & 2.8 MHz

buffer2

TX2

SBY

LED

VOX

buffer1

TX1

TSH512

LNA + ALC

LNA + ALC

Voice from the headset microphone

p hotodiode

LNA

TSH511

Audio

amp2

RX2

Audio

amp1

RX1

filter

1.7 MHz

Band-pass

Vcc

6/19

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