Осцилоскоп тип МOBILE SKOPE Q54 | |
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| georgi.oreshkov 10/02/2011 19:59 |
Здравсуйте колеги из Росия . Мне попала етот щука 10 мг гц осцилоскоп .Но у его нет горизонтальная разветка .У меня есть большой опит в любитеское конструирование осцилоскопов .Но с прехождение другий времян уже это не нужно .Осцилоскоп сделан в Венгрии. Я успел снят сервисное описание и схем. Нам схема обычная два компаратора SN72720N. Там 2щук .Можете ли сказать эст ли рускии аналог SN72720N? И двух схем сгорели.Вот попробую схему посылат.Не получилось но другой способ http://www.onlinedisk.ru/file/606577/ Здесь схема |
| n max 10/02/2011 21:03 |
ближайшее,не совсем совпадающее по ногам к140уд20 |
| RUZIK40 02/03/2011 18:30 |
TL820C SN72720N
TYPE TL720C DUAL DIFFERENTIAL COMPARATOR NOT RECOMMENDED FOR NEW DESIGN FOR NEW DESIGN, USE TL820C schematic (each comparator) JOR N DUAL-IN-LINE PACKAGE (TOP VIEWI COMPARATOR NO. I COMPARATOR NO.2 INV INV ~ VCC- INPUT INPUT GNO VCC NC OUTPUT NOftI~~TlNG INVIAltNG IN.", T OUTPUT:C ---4--0 Ycc- ~~ I~~~T VCC- COMPARATOR NO. I Component values shown are nominal. COMPARATOR NO.2 NC-No internal connection description absolute maximum ratings over operating temperature range (unless otherwise noted) Supply voltage V CC+ (see Note 1) Supply voltage VCC- (see Note 1) Differential input voltage (see Note 2) Input voltage (any input, see Note 1) Peak output current, each comparator (tw . 1 s) Continuous total power dissipation: each comparator tota I package Operating free-air temperature range . . . . Lead temperature 116 inch (1, 6 mm) from case for 60 seconds: J package Lead temperature 116 inch (1, 6 mm) from case for 10 seconds: N package NOTES: 1. All voltage values, except differential voltages, are with respect to the network ground terminal. 2. Differential voltages are at the non inverting input terminal with respect to the inverting input terminal. TEXAS)NSTRUMENTS INCORPORATED POST OFFICE BOX 225012. OALLAS. TEXAS 75265 TYPE TL720C DUAL DIFFERENTIAL COMPARATOR electrical characteristics at specified free-air temperature, Vcc+ (unless otherwise noted) PARAMETER VIO "VIO 110 liB VICR VID AVO VOH VOL ro ICC+ ICCI nput offset voltage Average temperature coefficient TEST CONDITIONS MAX UNIT of input offset voltage Input offset current I nput bias current Common-mode input voltage range Differential input voltage range Large-signal ditterential voltage amplification High-level output voltage Low-level output voltage Output resistance Supply current from VCC+ (each comparator) Supply current from VCC- (each comparator) Total power dissipation (each comparator) CMRR Common-mode rejection ratio NOTE 3:These characteristics are verified by measurements at the following temperatures and output voltage levels: TEST CONDITIONS No load. See Note 4 Response time NOTE 4: The response time specified is for a 100-mV input step with 5-mV overdrive and is the interval between the input step function and the instant when the output crosses 1.4 V. TEXAS INSTRUMENTS Взято здесь - http://www.datasheetarchive.com/datasheet-pdf/Scans-006/Scans-00139165.html Итого ищем TL820C |
