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The TM0071A is a CMOS circuit that converts a person's voice into sixteen or another different variations of speech. It is widely used in toy communication equipment. This article refers to the address: http://
This article refers to the address: http://
SF1212 is a camera-specific medium-scale integrated circuit with automatic exposure speed control, low illumination alarm and battery voltage detection. It is mainly used for electronic program control shutter and center shutter camera. This article refers to the address: http://
D0689 is a switch type integrated power supply thick film block (or component), which mainly performs oscillation, voltage control and current overcurrent protection, etc. It has the characteristics of good voltage regulation performance, few external components and convenient maintenance. The circuit is shown in the figure. Show. This article refers to the address: http:// The switching oscillation time of D0689 is divided into five stages: 1) T2 time: After the power is turned on, the...
D1031 is a field scanning integrated circuit. Its main functions are: field synchronization, field oscillator, sawtooth voltage formation, field output and echo clamp. It is mostly used for small and medium screen black and white or color TV. The maximum output power is about 2W. Application examples are shown in the figure. This article refers to the address: http://
Codec chip PT2262/PT2272 chip principle introduction PT2262/2272 is a low-power low-cost general-purpose codec circuit manufactured by Taiwan Pucheng Co., Ltd., PT2262/2272 can have up to 12 bits (A0-A11) three State address terminal pin (floating, connected to high level, connected to low level), any combination can provide 531441 address code, PT2262 can have up to 6 bits (D0-D5) data terminal pin, set address code and data The code is serially output from 17-pin and can be used in wireless...
This article refers to the address: http:// Connecting a variable resistor (potentiometer) in series can be used for audio control . In addition, it is obvious that if the 3 terminal (output terminal) of A1 is not connected to the 5 terminal of A2, it is connected to the 4 terminal of A2 (reset terminal). Is a beat generator.
567 is a universal tone decoder that provides a saturated transistor-to-ground switch when the input signal is in the pass band. The circuit is composed of an I and Q detector, and the voltage controlled oscillator drives the oscillator to determine the center frequency of the decoder. The center frequency bandwidth and output delay are independently set with external components. This article refers to the address: http:// Mainly used for oscillation, modulation, demodulation, and remote...
The BJ5250 is an integrated circuit used in the sound channel. It contains all the functions of the second audio intermediate frequency amplification, clipping, frequency discrimination, low frequency amplification and power amplification. It provides a maximum audio output power of 2.5W. Application examples such as The figure shows. This article refers to the address: http://
In the operation of the integrated operational amplifier , if an abnormal working state occurs, and the action is taken, the circuit will be damaged. The protection of the integrated operational amplifier mainly includes power failure protection, input protection and output protection. This article refers to the address: http://
D0689 is a switch type integrated power supply thick film block (or component), which mainly performs oscillation, voltage control and current overcurrent protection, etc. It has the characteristics of good voltage regulation performance, few external components and convenient maintenance. The circuit is shown in the figure. Show. This article refers to the address: http:// The switching oscillation time of D0689 is divided into five stages: 1) T2 time: After the power is turned on, the...
This article refers to the address: http://
SF1212 is a camera-specific medium-scale integrated circuit with automatic exposure speed control, low illumination alarm and battery voltage detection. It is mainly used for electronic program control shutter and center shutter camera. This article refers to the address: http://
Introduction to the principle of codec chip PT2262/PT2272 chip This article refers to the address: http:// PT2262/2272 is a low-power low-cost general-purpose codec circuit manufactured by Pucheng Company of Taiwan. The PT2262/2272 can have up to 12-bit (A0-A11) tri-state address pin (suspended, connected). High level, connected to low level), any combination can provide 531441 address code, PT2262 can have up to 6 bits (D0-D5) data terminal pin, set address code and data code serial output...
Introduction to the principle of codec chip PT2262/PT2272 chip This article refers to the address: http:// PT2262/2272 is a low-power low-cost general-purpose codec circuit manufactured by Pucheng Company of Taiwan. The PT2262/2272 can have up to 12-bit (A0-A11) tri-state address pin (suspended, connected). High level, connected to low level), any combination can provide 531441 address code, PT2262 can have up to 6 bits (D0-D5) data terminal pin, set address code and data code serial output...
D1031 is a field scanning integrated circuit. Its main functions are: field synchronization, field oscillator, sawtooth voltage formation, field output and echo clamp. It is mostly used for small and medium screen black and white or color TV. The maximum output power is about 2W. Application examples are shown in the figure. This article refers to the address: http://
567 is a universal tone decoder that provides a saturated transistor-to-ground switch when the input signal is in the pass band. The circuit is composed of an I and Q detector, and the voltage controlled oscillator drives the oscillator to determine the center frequency of the decoder. The center frequency bandwidth and output delay are independently set with external components. This article refers to the address: http:// Mainly used for oscillation, modulation, demodulation, and remote...
According to the theory of voltage control gain circuit and the design principle of amplifier, a variable gain power amplifier monolithic microwave integrated circuit (MMIC) based on GaAs process is designed and fabricated. The schematic and layout simulations were carried out using circuit simulation ADS software, and the influence of the position of the gain control circuit in the amplifier on the performance was studied. Finally, in the frequency range of 6 to 9 GHz, the output power of the...
This article refers to the address: http:// Fujitsu Microelectronics (Shanghai) Co., Ltd. announced today that Fujitsu is developing a new large-scale integrated circuit (LSI) that uses H.264 format for real-time compression and decompression of high-definition television images. The new large-scale integrated circuit chip will be released in March 2007. The chip is based on the H.264 processing algorithm developed by Fujitsu Labs Co., Ltd. and incorporates Fujitsu's 90nm process...
21ic Toshiba Corporation announced that it will introduce an audio codec integrated circuit that integrates the audio functions required for mobile devices such as smartphones and tablets, including microphone input and earpiece speakers. Amplifier, stereo headphone amplifier and line out. The new product TC94B24WBG is now sampling and is scheduled for mass production in March 2013. This article refers to the address: http:// Toshiba uses its proprietary single-microphone noise/echo...
A few days ago, some media learned from a number of domestic integrated circuit companies that the government departments are planning to set up a fund with a scale of 100 billion yuan to support domestic integrated circuit enterprises. If the fund is successfully implemented, the total size of the fund will exceed the investment of the entire domestic integrated circuit industry in the past 10 years. Many people familiar with the plan said that the newly established fund will be...
Guofa [2000] No. 18 The first chapter of the first chapter, through policy guidance, encourages funds, talents and other resources to invest in the software industry and integrated circuit industry, further promote the rapid development of China's information industry, and strive to make China's software industry research and development and production capacity reach or close to the international advanced by 2010. Level, and make China's integrated circuit industry become one of the...
1 Introduction At present, power-level LED products can be implemented in two ways: First, a single large-area power-level LED chip package is used. In the United States and Japan, 5W chips have been introduced to the market, and low-voltage and high-current constant-current driving power supplies are required. The price is also relatively high; the other is the use of low-power chip integration to achieve power-level LED, Japan Matsushita Electric has developed 20W integrated LED products....
The internal structure, function, and partial damage of the integrated circuit are not working properly. There are also two types of damage to integrated circuits: complete damage and poor thermal stability. When it is completely damaged, it can be removed, and the positive and negative resistance of each pin to ground can be measured compared with the normal integrated circuit. It is always found that one or several of the pins have abnormal resistance. For poor thermal stability, the...
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