 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
TDA7335 датащи(PDF) 8 Page - STMicroelectronics |
|
||||||||||||||||||||||||||||||
TDA7335 датащи(HTML) 8 Page - STMicroelectronics |
|
|
8 / 20 page  c)From now on where the sum input signal (left- right) amplified by the limiter exceeds the sig- nal detector threshold (3) the capacitor C7 is forced to charge. When the voltage across this capacitor reaches the comparator COMP1 threshold voltage Vth1 (approx. 2 Vbe) FF1 is set and FF2 is reset. (4) It follows that Q1 is turned on discharging the program de- tection capacitor (C7). d)Always when there is a recorded zone, Q1 is on; it becomes off only if a blank section is reached. When, with a time constant control- led by the R9,C9 network the voltage at space detection time pin reaches Vth2 thresh- old (comparator COMP2) a true blank section is detected and the FF2 is set. (The minimum charging time is approximately given by: 0.69 x C9x R9 [sec] In this condition Q2 is ON, forcing the open collector AMS output to go LOW, informing the user that a true blank section has been detected. The state is then able to start from the above point c). Figures 3-4 show the sig- nal behaviour. The device is able to prevent false interspace de- tection and the end of the tape. (see Fig. 4). Note: (3): minimum RMS input signal is given by: Vin = AMSVth = 1K + R8 101K + R8 ⋅ 0.6 where Vin is the mean of left and right channels: Vin = Vright + Vleft 2 (4): the charging current at pin 9 is about 20 µA (half input signal) so program detection time constant is given by: C7 x 2Vbe 20 µA = 70 x C7 [µF] = [msec] It is recommended to insert a resistor (R7) high enough to prevent fast C7 capacitor discharging. AMS Gin RB 0.22 µF C8 IN-L 21 1K 100K Rp21 R9 + Vs 6 25 IN-R LIMITER AMPLIFIER Vth0 - + SIGNAL DETECT. COMPARATOR Vs POWER-ON RESET AMS th NOR1 Q1 Vth1 - + 22 AMS OUT Q FF2 S R COMP1 COMP2 Q2 Q FF1 R S Q 0.1 µF C7 R7 500K PROGRAM DETECTION TIME T2 T1 C15 C9 R9 SPACE DETECTION TIME Vs INTS AMS SW INTP 23 9 D93AU098 10 8 Figure 2: Audio Music Sensor TDA7335 8/20 |
Аналогичный номер детали - TDA7335 |
|
Аналогичное описание - TDA7335 |
|
|
|
ссылки URL |
| Конфиденциальность |
| ALLDATASHEETRU.COM |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
