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TSH512C 数据表(PDF) 18 Page - STMicroelectronics |
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TSH512C 数据表(HTML) 18 Page - STMicroelectronics |
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18 / 19 page  TSH512 18/19 APPLICATION SCHEMATIC The Electret Condenser Microphone is biased with MIC-BIAS1 voltage. The audio signal is transmitted on the left channel using a 2.8 MHz carrier. The VOX activates the transmitter TX1 when the audio signal is present. The audio signal at line level is attenuated and is transmitted by the second transmitter TX2 at 2.3 MHz. R25 3K9 R38 39k C27 nc C9 470nF R34 100K 1K C28 470pF C34 2nF2 P4 50K C7 100nF C14 470nF C13 470nF VCC R44 22K C42 56pF C44 56pF D2 C50 12pF L4 R9 47K VCC C46 82pF C41 56pF C32 nc L6 nc C16 220nF R26 33K C10 470nF VCC C15 470nF R24 1K C17 1uF C57 10uF P5 220K MIC1 MICRO J20 VCC R37 390 C26 nc R33 100K C25 470pF C24 2nF2 P3 C6 100nF C11 470nF C12 470nF VCC R43 22K C39 56pF C43 56pF C37 D1 C49 12pF R6 47K VCC C45 680pF C40 56pF C56 L5 C20 1uF J7 RCA C8 470nF VCC C53 22nF C52 22nF D4 TSFP5400 Q2 BC847 VCC-LED D3 TSFP5400 Q1 BC847 VCC-LED INPUT LINE TX2 (RIGHT) A B TX2 ON OFF J20 A B C21 1uF VCC L3 120uF C59 nc C55 R1 10K R2 1K C5 100nF C4 100nF 33K C33 1uF C23 1uF TX1 = 2.8MHz TX2 = 2.3MHz C58 100nF Reject filter 2.3MHz Reject filter 2.8MHz (optional) (optional) DEC2 1 MIC-BIAS2 2 GND 3 VCC 4 SBY 5 VOX-INTS 6 VOX-SENS 7 VCC 8 GND 9 MIC-BIAS1 10 DEC1 11 GND 23 BUF-IN1 24 BUF-OUT1 25 VCC 26 VOX-MUTE 27 VOX-INTN 28 VOX-TIMER 29 GND 30 BUF-OUT2 31 BUF-IN2 32 GND 33 LNA + - + - ALC PEA LNA PEA VOX + - Monostable ALC IC? TSH512-B . . TSH512 R25 3K9 R38 39k C27 nc C9 470nF R34 100K 1K C28 470pF C34 2nF2 P4 50K C7 100nF C14 470nF C13 470nF VCC R44 22K C42 56pF C44 56pF D2 C50 12pF L4 R9 47K VCC C46 82pF C41 56pF C32 nc L6 nc C16 220nF R26 33K C10 470nF VCC C15 470nF R24 1K C17 1uF C57 10uF P5 220K MIC1 MICRO J20 VCC R37 390 C26 nc R33 100K C25 470pF C24 2nF2 P3 C6 100nF C11 470nF C12 470nF VCC R43 22K C39 56pF C43 56pF C37 D1 C49 12pF R6 47K VCC C45 680pF C40 56pF C56 L5 C20 1uF J7 RCA C8 470nF VCC C53 22nF C52 22nF D4 TSFP5400 Q2 BC847 VCC-LED D3 TSFP5400 Q1 BC847 VCC-LED INPUT LINE TX2 (RIGHT) A B TX2 ON OFF J20 A B C21 1uF VCC L3 120uF C59 nc C55 R1 10K R2 1K C5 100nF C4 100nF 33K C33 1uF C23 1uF TX1 = 2.8MHz TX2 = 2.3MHz C58 100nF Reject filter 2.3MHz Reject filter 2.8MHz (optional) (optional) DEC2 1 MIC-BIAS2 2 GND 3 VCC 4 SBY 5 VOX-INTS 6 VOX-SENS 7 VCC 8 GND 9 MIC-BIAS1 10 DEC1 11 GND 23 BUF-IN1 24 BUF-OUT1 25 VCC 26 VOX-MUTE 27 VOX-INTN 28 VOX-TIMER 29 GND 30 BUF-OUT2 31 BUF-IN2 32 GND 33 LNA + - + - ALC PEA LNA PEA VOX + - Monostable ALC IC? TSH512-B . . TSH512 |
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