TSH512

Application information

Doc ID 8120 Rev 7

17/31

Figure 24.

Headset-side block diagram

4.3.2

Computer side

In multimedia applications, the TSH512 transmits the hi-fi stereo from the PC to the

headset.

Figure 25.

Computer-side block diagram

TSH512

LNA + ALC

LNA + ALC

MIC. BIAS

MIC. BIAS

TX2

TX1

VOX

SBY

buffer1

buffer2

photodiode

Vcc

LED

Vcc

Audio

amp2

LNA

2.3 MHz

Band-pass

TSH511

HiFi stereo from the PC:

2 x 20 mW /16

Ω

1.7 MHz

Band-pass

Voice transmitted to the PC

Microphone Tx:

1.7 MHz

carrier

Stereo Rx:

2.3 & 2.8 MHz

filter

1.7 MHz

reject

2.8 MHz

Band-pass

TSH511 & 512 supply:

2.3 to 5.5V, 25 mA

Audio

amp1

filter

filter

filter

RX2

RX1

1.7 MHz

reject

filter

Vcc

-

HiFi

-

Microphone Tx:

1.7 MHz

carrier

Stereo Rx:

2.3 & 2.8 MHz

filter

-pass

:

filter

filter

filter

filter

LNA + ALC

LNA + ALC

SBY

buffer1

buffer2

LED

photodiode

TSH511 & 512 supply:

2.3 to 5.5V, 24 mA

TSH512

Audio

amp1

Audio

amp2

LNA

RX2

RX1

filter

TSH511

Vcc

1.7 MHz

HiFi stereo Tx:

2.3 & 2.8 MHz

mono Rx:

1.7 MHz

Voice from the headset microphone

HiFi stereo

VOX

TX2

TX1