The classical high-frequency head circuit

Published:2011/6/3 7:16:00 Author:Seven | Keyword: high-frequency

The classical high-frequency head circuit,FM, it is only for reference, the parameter of the element is self-decided.   (View)

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The separation thermocouple circuit of compensation

Published:2011/6/3 7:19:00 Author:Seven | Keyword: separation thermocouple

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The low-cost air-conditioning MPUH of PIC16C54

Published:2011/6/3 6:49:00 Author:Seven | Keyword: air-conditioning MPUH

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The principle circuit of classical Motorola L7 cellphone (3/7)

Published:2011/6/3 7:05:00 Author:Seven | Keyword: principle circuit, Motorola

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The principle circuit of classical Motorola L7 cellphone (4/7)

Published:2011/6/3 7:07:00 Author:Seven | Keyword: principle circuit, Motorola

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SMC6215--the communication single door microcomputer integrated circuit

Published:2011/6/5 9:58:00 Author:qqtang | Keyword: single door, microcomputer

SMC6215 is a communication single door microcomputer integrated circuit, which is widely used in Panasonic intelligent multi-function phones.1.function featuresSMC6215 contains clock oscillating circuit, key pulse generating circuit, key order encoding circuit, off-hand control circuit, music retaining circuit, dual audio/pulse dialing shifting control circuit, storage circuit, starting control circuit, steady power supply circuit, dialing control circuit, LED display signal decoding and drive circuit, and other additional function circuits.   (View)

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SM5840BP—the integrated circuit of the digital filter

Published:2011/6/5 11:54:00 Author:qqtang | Keyword: integrated circuit, digital filter

SM5840BP is an integrated circuit of the digital filter produced by Philips, which is widely used in disc players, digital TV and other digital products.1. Functions featuresSM5840BP contains the clock oscillating circuit, reset circuit and digital filter circuit, etc.2.pin functionsSM5840BP is in 18-pin dual line package, whose pin functions and data are listed in the table.Pin functions and data of SM5840BP   (View)

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SM5544H—the digital clock integrated circuit

Published:2011/6/5 12:06:00 Author:qqtang | Keyword: digital clock, integrated circuit

SM5544H is a digital clock integrated circuit, the quartz in it is punctual, simple and long-lived.1.function featuresSM5544H includes the clock oscillate circuit, frequency splitting circuit, ringing output control circuit, etc. Its internal circuit is in the figure. The internal circuit of SM5544H2.pin functions and the typical application circuitSM5544H is in 8-pin dual line package, whose pin functions and data are listed in the table, and its typical application is shown in the figure.Pin functions and data of SM5544H   (View)

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SKW01-829A2202——the single chip microcomputer integrated circuit

Published:2011/6/5 12:27:00 Author:qqtang | Keyword: single chip, integrated circuit

1.function features SKW01-829A2202 includes CPC, clock oscillating circuit, reset protection circuit, key scanning pulse generating circuit, key scanning order decoding circuit, I2C general control circuit, screen letter display circuit, signal process circuit of remote control order and other control or additional function circuit, etc.2.pin functions and data SKW01-829A2202 is in 42-pin dual in-line package, whose internal and pin functions with signal flow are shown in the figure, pin letter codes and data are listed in the table.   (View)

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SID250O-D0BO--the RGB process integrated circuit

Published:2011/6/6 2:28:00 Author:qqtang | Keyword: RGB process, integrated circuit

1. Function featuresSD250O-DOBO includes the lzC general control circuit, letter RGB base color signal process circuit, contrast ratio control circuit, OSD connector circuit, brightness conformity control circuit, clamp door limiting circuit, video/display switch circuit, letter color shift circuit, semi-hue control circuit, video half-hue circuit, brightness control circuit and other additional function circuits, whose internal circuit is in the figure.2.pin functions and dataSD250O-DOBO is in 28-pin dual in-line package.   (View)

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SG3844--the intelligent circuit of the switch power supply thick film

Published:2011/6/6 3:03:00 Author:qqtang | Keyword: intelligent circuit, switch power supply

SG3844 is an intelligent circuit of the switch power supply thick film, which is widely used in disc players, fax machine, printer and all kinds of charging electric equipment.1.pin functions and dataSG3844 is in 8-pin dual line package, whose pin functions and data are listed in the table,pin functions and data of SG3844 2.typical application circuitThe switch power supply typical application circuit of SG3844 The typical application circuit of SG3844   (View)

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TDA1013B—the audio power amplifier integrated circuit

Published:2011/6/6 12:27:00 Author:qqtang | Keyword: audio power amplifier, integrated circuit

TDA1013B is an audio power amplifier integrated circuit produced by Philips, which is used in multimedia stereos, TV stereos and domestic stereos, etc.1.pin functions and dataTDA1013B is in 9-pin single in-line package, whose pin functions are data are listed in Figure 1. 2.typical application circuitThe typical application circuit of TDA1013B is shown in Figure 1. Notes: when the sound volume is malfunctioning, we should pay attention to the voltage on the 7-pin of TDA1013B.   (View)

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TDA2009--the integrated circuit of dual audio power amplifiers

Published:2011/6/5 3:36:00 Author:qqtang | Keyword: integrated circuit, dual audio power amplifiers

1.functions features TDA2009 includes two lines of audio power amplifier circuits with same functions, which characterizes heat protection and few external components, etc.2.pin functions and data TDA2009 is in 11-pin single line package, whose pin functions and data are listed in Table 1.Table 1 pin functions and data of TDA2009 3.main parametersThe power supply working voltage of TDA2009 is 8-28v, typical working voltage is 24v, maximum static current is 120mA, typical value is 80mA.4.typical application circuitTDA2009 can form 2 channels, and it can also work in BTL way.   (View)

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TDA1521--the integrated circuit of dual channel audio power amplifiers

Published:2011/6/5 3:58:00 Author:qqtang | Keyword: integrated circuit, power amplifiers

TDA1521 is an integrated circuit of dual channel audio power amplifiers produced by Philips, which is widely used in domestic stereos, TV stereos, multimedia stereos, auto stereos and computer stereos, etc.1.functions featuresTDA1521 contains two lines of audio power amplifier circuits with same functions, and it also has functions of turning on/off, overheat and short protection, etc. When the power supply voltage is ±12v or ±14v, the output power of each channel is 6W.2.pin functions and dataTDA1521 is in 9-pin single line package.   (View)

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The TDA1517 and TDA1517P1 integrated circuits of dual channel audio power amplifiers

Published:2011/6/5 4:12:00 Author:qqtang | Keyword: integrated circuits, dual channel audio

TDA1517 and TDA1517P1 are the B type integrated circuits of dual channel audio power amplifiers, which are widely used in domestic stereos, TV stereos, auto stereos, multimedia stereos and computer stereos, etc.TDA1517 and TDA1517P1 have almost the same functions, only packaging method and the No. of pins are different. The earlier is in 9-pin single line package, and the other is in 18-pin dual line package, but 10 to 18 pins are used to connect the ground for cooling, and the other pin functions are the same with TDA1517, by noticing these differences, we know that the two can exchange each other.   (View)

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The principle circuit of classical Motorola L7 cellphone (2/7)

Published:2011/6/3 7:01:00 Author:Seven | Keyword: principle circuit, Motorola

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The principle circuit of classical Motorola L7 cellphone (7/7)

Published:2011/6/3 7:12:00 Author:Seven | Keyword: principle circuit, Motorola

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The thermocouple data collecting circuit

Published:2011/6/3 1:39:00 Author:Seven | Keyword: thermocouple, data collecting circuit

Figure 1-1 the thermocouple light-separation temperature testerIn the figure, the working temperature of the J thermocouple ranges from 0℃ to 500℃. The light-separation circuit is used in the temperature control instrument. LT1025A is a low-power thermocouple cool pole compensator. Lt1019-2.5 is a precision reference voltage source.Notes: products of LTC and LT series are shown in the pamphlets of LINEAR Corp..   (View)

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1A transistor drived by photoelectric diode circuit

Published:2011/6/8 20:59:00 Author:chopper | Keyword: 1A, transistor, photoelectric diode

Any normal optoelectronic isolator have enough output to satisfy the input current requirement of 1A power transistor.When the driving signal is not available,R1 absorbs base current of Q1 and makes it close.When the power source is through LED D1,the current less than 20 μA generated by photoelectric diode D2 can make LM195 connected.Supply voltage can reach 42V.   (View)

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The stereo driver

Published:2011/6/3 6:54:00 Author:Seven | Keyword: stereo driver

This preamplifier has a low output impedance, and is designed to drive long cables, allowing you to listen to a remote music source without having to buy expensive screened cables. The very low output impedance of around 16 ohms at 1KHz, makes it possible to use ordinary bell wire,loudspeaker or alarm cable for connection. The preamplifier must be placed near the remote music source, for example a CD player. The cable is then run to a remote location where you want to listen. The output of this preamp has a gain of slightly less than one, so an external amplifier must be used to drive loudspeakers.   (View)

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