Circuit Diagram

TA7792--the FM/AM reception single door integrated circuit

Published:2011/6/9 23:40:00 Author:qqtang | Keyword: FM/AM reception, single door, integrated circuit

TA7792 is the FM/AM reception single door integrated circuit produced by TA7792, which is widely use in low-voltage portable stereo and communication equipment.1.function featuresTA7792 contains FM AGC, self-oscillating, mixing, IF, frequency discrimination circuit; AM AGC, self-oscillating, mixing, IF, detection circuit and other affiliated circuits.2.pin function and dataTA7792 in is 16-pin dual line package, whose pin functions and data are listed in table 1.Table 1. The pin functions and data   (View)

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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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The digital tachometer circuit

Published:2011/6/6 11:48:00 Author:qqtang | Keyword: digital tachometer

The circuit mainly consists of the magnetic disc with permanent magnet, Hall integrated sensor, strobing gate circuit, time-based signal circuit, power supply and digital display circuit, etc. The counting and digital display circuit are fixed with CMOS-LED digital display component CLIO2, and it can count and displaying digits. The input axis of the rotating disc and the rotating axis under test are connected, when the axis is rotating, the rotating disc is running with it. When the little permanent magnet crosses the Hall integrated circuit IC1, IC1 will switch the magnetic signal into the rotating speed signals.   (View)

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the digital stopwatch circuit

Published:2011/6/6 12:04:00 Author:qqtang | Keyword: digital stopwatch

In the figure is the digital stop watch circuit. 5G5544(IC1) in the figure is a quartz integrated circuit, and it works as the second generator. 5G5544 outputs a pulse that the period is 2s by the 3-pin and the 5-pin, VD3,VD4 and VT1 consist a LEV converting circuit, and the second signal output is got. CD4518(IC2) contains two same decimal calculators, so binary counting can be formed, if more bit counting is needed, multi-connection can be done. CD4511(IC3、1C4) is the BCD-7 decoding/drive integrated circuit.   (View)

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The TDA1175 single chip field scanning integrated circuit

Published:2011/6/6 12:17:00 Author:qqtang | Keyword: single chip field, integrated circuit

TDA1175 is a single chip field scanning integrated circuit produced by Philips, which is widely used in all kinds of local and imported color screen field scanning circuits.1.pin functionsThe internal circuit of TDA1175 includes field oscillator, sawtooth wave generator, synchronized circuit, voltage steady circuit, retrace generator and power amplifier, etc. The internal circuit of it is shown in Figure 1.As the core of the scanning circuit, TDA1175 has the following characters:(1) it has a separated synchronized amplifier circuit, so it can increase the amplitude of the magnify field;   (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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The integrated chroma signal handle circuit

Published:2011/6/4 8:38:00 Author:qqtang | Keyword: chroma signal

1.function featuresTDA4555 contains ACC amplifier and detection circuit, PAL/NTCC/SECAM recognize and shift control circuit, SECAM modulation circuit, matrix circuit, NTSC hues circuit, 1/2 frequency splitting circuit, channel selecting circuit, color removing circuit circuit, scanning steady circuit, removing circuit, control output circuit and other additional circuits.The internal circuit of TDA4555 is shown in Figure 1. Figure 1 the internal circuit of TDA4555 2.pin functions and dataTDA4555 is in 28-pin dual in-line package.   (View)

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The integrated circuit of chromatism and basic color signal matrix

Published:2011/6/4 9:01:00 Author:qqtang | Keyword: integrated circuit, chromatism, basic color signal matrix

1.function featuresTDA3504 contains 3 basic color matrix circuit, 3-line signal switch shift circuit, 3-line comparing control circuit, 3-line lightness control circuit, 3-line clamp-on circuit, Y(lightness) signal amplifier circuit, lightness removing motivation circuit, channel-selecting and amplitude and other additional circuit. The internal circuit of TD3504 is shown in Figure 1.Figure 1. The internal circuit of TDA3504 2.pin functions and dataTDA3504 is in 20-pin dual in-line package.   (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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The TDA1675A field scanning integrated circuit

Published:2011/6/5 3:46:00 Author:qqtang | Keyword: field scanning, integrated circuit

TDA1675A is a field scanning integrated circuit produced by Philips, which is widely used in local and imported TV screens, such as EMC color TV screens, etc.1. Function features TDA1675A contains a synchronize circuit, field oscillator, field sawtooth wave generator, field pre-motivation circuit, pulse removing generator, heat protection circuit, OTL dual power supply output stage and other additional circuits, etc. The internal circuit of it is shown in Figure 1.Figure 1. The internal circuit and typical application circuit of TDA1675A   (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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class AB dual-supply complementary symmetry circuit

Published:2011/6/8 20:06:00 Author:chopper | Keyword: class AB, dual-supply, complementary symmetry

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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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OCL drived by NPN tube circuit

Published:2011/6/8 20:07:00 Author:chopper | Keyword: OCL, NPN

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