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STV5728 bảng dữ liệu(PDF) 2 Page - STMicroelectronics |
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STV5728 bảng dữ liệu(HTML) 2 Page - STMicroelectronics |
2 / 11 page Record Mode (Video) The current input applied on RECIN Pin is amplified througha transconductanceamplifier. Special care has been taken to speed up commutation from Playback to Record and from Record to Playback, avoiding spikes through the loads (the rotary trans- formers). The recording current level in LP mode is 0.9 time the value of SP one. Playback Mode (FM HIFI) Signals applied on H1FM and H2FM input Pins will be amplified by 70dB voltage gain. IOUTFM Pin is AC short-circuited to ground by CCOM1. The input signal can be selected through SWFMH input and the correspondingoutput signal will be available on Pin FMPB. Record Mode (HIFI) The current input applied on FMRIN Pin is amplified through an Automatic Gain Control amplifier. The recording level can be adjusted thanks to the RADJ resistance connected to TRIV Pin. Special care has been taken to speedup commutation fromPlayback to Record and from Record to Playback, avoiding spikes through the loads (the rotary transformers). 1 2 3 4 5 6 7 8 9 10 19 60dB 60dB De tector Re cord Amplifica tor STV5728 H1SP H2SP S P HEADS CCOM SWR SWH SWM V CC YREC CREC CPB YPB TRIV (ATR) +5V Rrcy Rrcc REC PB H2LP H1LP H1SP H2SP H2LP H1LP LP HEADS 60dB 60dB 21 Playba ck AGC 22 23 24 20 25 26 27 28 CAGC ENV Enve lope Comp 8.2k Ω 22k Ω 11 12 13 14 CCOM2 H1FM H2FM 70dB 70dB HIFI HEADS Re cord Re ference Current (FM) R ADJ FMREC Rfmin 18 FMPB 17 SWFMH 16 V CCFM 15 +5V Re cord AGC H1FM OFF H2FM ON PB REC MUTE BLOCK DIAGRAM FUNCTIONAL DESCRIPTION STV5728 2/11 |
Số phần tương tự - STV5728 |
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Mô tả tương tự - STV5728 |
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