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MC145151-2 PLL frequency synthesizer circuit diagram

Published:2011-7-21 2:12:00 Author:Ecco | Keyword: PLL frequency synthesizer

MC145151-2  PLL frequency  synthesizer circuit diagram
MC145151-2 is the PLL frequency synthesizer IC with dual preset fixed-frequency device. It is suitable for high frequency communications equipment. It has three packages, in order to distinguish by the letter suffix, of which MC145151P-2 is packaged with 28 pin dual in-line package, and MC145151DW-2 is packaged with the 28 pin dual in-line package, and MC145151DW-2 is packaged with the 28-pin package, and MC145151FN-2 is packaged with the SMD ring package. The pin functions are listed in Table.   (View)

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Voltage follower circuit diagram

Published:2011-7-20 20:11:00 Author:Ecco | Keyword: Voltage follower

Voltage follower circuit diagram
High output resistance and small input resistance can truly transmit input signal to the load, then the signal source currentis low. Voltage follower is a common collector circuit, and the signal is input from the base and output from the emitter, so it is also known as emitter device. Base voltage and collector voltage have the same phase, that is, the input voltage and output voltage is in-phase. The main features of this circuit are: high input resistance, low output resistance, voltage gain is approximately 1, so it is called a voltage follower.   (View)

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The typical application circuit and internal block diagram of LAG668B IC

Published:2011-6-23 2:46:00 Author:Ecco | Keyword: typical application, internal , block diagram , IC

The typical application circuit and internal block diagram of LAG668B IC
Features of functionLAG668B IC contains two high fidelity pre-amplifier and power amplifier within subwoofer excitation circuit and motor circuit with steady speed. The IC is not combined input capacitor and output coupled capacitor. The block diagram of the circuit and typical application circuit is shown as the circuit. Main electrical parameters The main parameters of LAG668B IC are following:Supply voltage range: 2.3 -4 · 5V, the typical operating voltage is 3V, limit 1 is used as the voltage with 7V.Static current: it is about 18nA. Dynamic operating current: the maximum is 400mA. Because of its large internal resistance, low current, you can get a wide dynamic range both in the case of low and high volume, and the sound quality is good. Power: flat package type is 450mW; dual in-line is 750mW. The typical application circuit and internal block diagram of LAG668B IC is shown as the chart.   (View)

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Four times pressure fluorescent lamp starting circuit diagram

Published:2011-7-20 20:13:00 Author:Ecco | Keyword: Four times , pressure, fluorescent lamp, starting

Four times pressure fluorescent lamp starting circuit diagram
When the A end is positive, B end is negative, the current path is A → L → C2 → D4 → B to make C2 be charged to the peak of electric supply. When the B end is positive, A end is negative, the current path is B → D3 → C1 → L → A to make C1 be charged to the peak of electric supply. At the same time, when A is positive, B is negative, electric supply connected to the voltage on C1 in series will pass D5 to make C3 charge to twice of the peak value; when B is positive, A is negative, electric supply connected to the voltage on C2 in series will pass D6 to make C4 charge to twice of the peak value.   (View)

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The working principle circuit diagram of HT9170

Published:2011-7-20 20:13:00 Author:Ecco | Keyword: working principle

The working principle circuit diagram of HT9170
HT9170 will send DTMF signal to the pre-filter (actually a band stop filter) after passing the operational amplifier to filter the 350 ~ 400Hz low frequency interference and noise in DTMF signals. Basically, the output signal contains only two frequencies. The output signals will output high-frequency and low-frequency sine wave signals after respectively passing the two band-pass filters with high-frequency and low-frequency filters, then they will be turned into the rectangular pulses with the same frequency after shaping by the Schmitt circuit.   (View)

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Digital velocity detection circuit

Published:2011-5-13 3:33:00 Author:Nicole | Keyword: digital velocity detection

Digital velocity detection circuit
CC4060 oscillation, frequency divider produces standard second signal, to adjust 58kΩ resistance, to make Q9 outputs T=2s square wave(duty cycle is 50%). CL102 completes counting, latch, decoding, display function. RC forms oscillator, but the precision is not high. In demanding occasion, we can use 555 timer circuit or quartz crystal oscillator. When Q9 of CC4060 is low level(about 1s), the circuit starts to count; when Q9 isjumping, the timer is latched. 4 bits LED displays the number of count pulse per second.   (View)

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Random electronic dinky toy circuit

Published:2011-5-13 2:59:00 Author:Nicole | Keyword: electronic dinky toy

Random electronic dinky toy circuit
This toy circuit can be played by 2 persons, even more people. If it does not press AN, thecircuit is turned on, LED1 and LED2 is flashing by turns; to press AN, only one of LEDs turns on, it is random. To order if LED1 turns on, it will obtain 1 point, and LED2 turns on, it will obtain negative-one point, the victory or defeat is decided by everyone's final point.   (View)

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Bridge luminometer circuit

Published:2011-5-13 2:29:00 Author:Nicole | Keyword: luminometer

Bridge luminometer circuit
The electric bridge is composed of phototube PC1, R1, R2, R3, differential input terminal of operational amplifier 741 is connected to the middle point of electric bridge both arms. When PC1 has no light, the electric bridge is balance, 741 output is 0, after it has light, the electric bridge loss balance, 741 output terminal level is directly proportional to the brightness, the meter indicates the brightness value. The balance adjustment steps of electric bridge: you can shading the phototube at first, adjusting R5 to the maximum value, then adjusting R3 to make the meter indicates 0. To reduce R5, making the meter hand stray away from 0, then adjusting R3 to make the meter indicates 0. To repeat this process, it can obtain the maximum sensitivity. The broken line shows 0.1μF decoupling capacitance.   (View)

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MCP component(MMl521XV) internal structure block diagram and its protection circuit

Published:2011-5-13 4:22:00 Author:Nicole | Keyword: component, internal structure

MCP component(MMl521XV) internal structure block diagram and its protection circuit
MCP is a multi- package produce which puts the integrated protection circuit and charge-discharge control into the same package. The internal structure block diagram is as below:   (View)

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LM317T application circuit

Published:2011-5-13 4:17:00 Author:Nicole

LM317T application circuit
LM317T can be used to make adjustable regulated power supply, the load is often damaged due to the potentiometer's poor contact lead to voltage rise. If a triode is added(As shown in the figure), under normal circumstances, T1's base level is 0, T1 cuts off, it has no influence on circuit; when the W1 is poor contact, T1's base level rises, when it rises to 0.7V, T1 turns on, LM317T's adjustment terminal voltage drops, output voltage drops too, it can protect the load. If the triode is removed and the W1 middle point connecting line is cut off, 3.8V bulb will be burned down immediately, the output voltage reaches 21V. If it is added T1, the brightness of bulb will reduce, then LM317T output voltage is only 2V, it can effectively protect the load.   (View)

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M24C08-MN6T-E(2)PROMAO~A7 storage integrated circuit diagram

Published:2011-5-16 2:53:00 Author:Nicole | Keyword: storage

M24C08-MN6T-E(2)PROMAO~A7 storage integrated circuit diagram
M24C08-MN6T is a E(2)PROMAO~A7 storage integrated circuit which is produced by Mitsubishi Corp, it is widely used in all kinds of models and size large screen color television. 1. functions and features M24C08-MN6T integrated circuit contains I square meter C bus circuit, memory address and storage singal control circuit and other assistant functions circuits. 2. pin function and data M24C08-MN6T integrated circuit adopts 8-foot dual in-line package, the pin function and data of this integrated circuit is shown in the table1. Note: When M24C08-MN6T is used to different models, the writing process is different, so it can not bechanged directly.   (View)

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Matrix Audio Switch Integrated Circuit

Published:2011-7-19 10:39:00 Author:Michel | Keyword: Switch Integrated Circuit

Matrix Audio Switch Integrated Circuit
Matrix Audio Switch Integrated Circuit

TEA6420 and TEA6430 are matrix audio switch integrated circuits produced by Thomson Company of France,which are widely used in the DLP projection TV, such as ChangHong 51PT28A DLP projection TV. First,Function Features TEA6420 and TEA6430 integrated circuit have five groups of stereo input, four groups of stereo output ends,gain control and mute control circuits, I(2)C bus decoder, power supply circuit and other auxiliary function circuit. Its intergrated block inside circuit block diagram is shown as picture 1-1.Picture 1 : Inside Circuit Block Diagram of TEA6420 and TEA6430 Intergrated Block Second,Pins Functions and Data TEA6420 and TEA6430 intergrated circuits use 24 feet DIP package and their pins functions and data are shown as table 1-2.   (View)

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TEA6415C Matrix Video Switch Integrated Circuit

Published:2011-7-19 10:58:00 Author:Michel | Keyword: Video, Switch Integrated Circuit

TEA6415C Matrix Video Switch Integrated Circuit
TEA6415C Matrix Video Switch Integrated Circuit

TEA6415C is matrix video switch integrated circuit produced by Thomson Company of France which is widely used in the DLP projection TV, such as ChangHong 5lPT28A etc. First,Functions Features The video switch circuit of TEA6415C integrated circuithas eight input and six the output ends. The switch function of intergrated block is controlled by I (2) C bus.And the block diagram is shown as picture 1-1. Second,Pins Functions and Data TEA6415C IC adopts 20 feet DIP package and its pins functions and data are shown as table 1-2.   (View)

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Power Pupply, Starting and Ignition Circuit Principle Diagram of Liberation CA6400 Series Light Bus

Published:2011-7-19 9:34:00 Author:Michel | Keyword: Power Pupply, Starting, Ignition Circuit, Principle Diagram

Power Pupply, Starting and  Ignition Circuit Principle Diagram  of Liberation CA6400 Series Light Bus
Power Pupply, Starting and  Ignition Circuit Principle Diagram  of Liberation CA6400 Series Light Bus
Power Pupply, Starting and  Ignition Circuit Principle Diagram  of Liberation CA6400 Series Light Bus

Picture: Power Pupply, Starting and Ignition Circuit Principle Diagram of Liberation CA6400 Series Light Bus 1·2一fusible line, 17一 integral ac generators,18一battery,19-rechargeable lights ,20-starter,21-ignition coil ,22-gnition switch,23-Hall type distributor ,24-ignition electronic device,25-idle block valves ,26-hot time valve ,27-automatic windshield door,28-spark plug.   (View)

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TEA2025 Double Track Power Amplifier Integrated Circuit

Published:2011-7-19 11:35:00 Author:Michel | Keyword: Double Track, Power Amplifier, Integrated Circuit


TEA2025 is double track power amplifier integrated circuit manufactured in Europe.This circuit has a high track separation degree and the impact noise is small.The external devices are less and the biggest gain can be adjusted by external resistance.TEA2025 is used in pocket type or portable stereo system as power amplifier. First,TEA2025 Inner Circuit Block Diagram and Pins Functions TEA2025 block is composed of two same fucntions audio preplay ,power amplifier,drving circuit and power supply circuit.Its inner circuit block diagram and double track circuits are shown as picture 1-1.This IC uses 16 feet DIP package and integrated circuit pins functions and data are shown table 1-2. Picture 1-1:Inner Circuit Block Diagram and Two Track Application Circuit of TEA2025   (View)

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Signal Processing,Servo and Integrated Circuit of CXA1782BQ and CXA1782BR-RF

Published:2011-7-19 11:37:00 Author:Michel | Keyword: Signal Processing, Servo, Integrated Circuit

Signal Processing,Servo and Integrated Circuit of CXA1782BQ and CXA1782BR-RF
Signal(View)

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Three Colors Coding Integrated Circuit of CXA1645M VCD

Published:2011-7-19 10:13:00 Author:Michel | Keyword: Three Colors, Coding Integrated Circuit

Three Colors Coding Integrated Circuit of CXA1645M VCD
CXA1645M is three colors coding integrated circuit of VCD prodcued by SONY,which is widely used in SONY, Samsung and Sharp VCD. First,Inner Circuit Block Diagram CXA1645M internal includes color TV signal P/N coding system function and it can output video P/N system full TV signalor blue separation S terminal output signal as long as R, G, B three colors signal and composite synchronous pulse signal are input.The two kinds of output in IC internal have buffer amplifier and the best load is 75 Ω. CXA1645M internal does not set color coding of special color subcarrier oscillator.The special negative carrier generating circuit is used when it is used in the VCD.   (View)

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Q adjustable notching filter circuit

Published:2011-7-17 2:03:00 Author:Fiona | Keyword: notching filter

Q adjustable notching filter circuit
Q adjustable notching filter circuit is shown as above:   (View)

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polarity detector of absolute value amplifier circuit

Published:2011-7-17 23:50:00 Author:Fiona | Keyword: absolute value amplifier, polarity detector

polarity detector of absolute value amplifier circuit
Polarity detector of absolute value amplifier circuit is shown as above:   (View)

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Low input current circuit that quick summary of the amplifier

Published:2011-7-17 23:01:00 Author:Fiona | Keyword: quick summary of the amplifier

Low input current circuit that quick summary of the amplifier
Low input current circuit that quick summary of the amplifier is shown as above:   (View)

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