According to the output mode of the voice chip is divided into two categories, one is PWM output mode, the other is DAC output mode, PWM output volume is not continuous adjustable, can not be connected to the ordinary power amplifier, most of the voice chip on the market is PWM output mode. The other is the DAC amplified by the internal EQ, the voice chip sound is continuously adjustable, can be adjusted by digital control, and can be connected to an external power amplifier.
PWM (Pulse Width Modulation) output: The voice chip can be output through PWMTo simulate the audio signal. The analog output of audio signal can be realized by controlling the width and frequency of pulse. This type of output is typically used to connect to speakers, motors, or other devices that require PWM control. It should be noted that different voice chips may support different output modes, depending on product design and application requirements.
Sinusoidal PWM has been well known, and the multi-PWM technology designed to improve the output voltage and current waveform and reduce the harmonics of the power system has its unique advantages in high-power inverters (such as ABB ACS1000 series and the United States R)0 seconds and 80 seconds (6K sampling). Has 1 Input pin and 2 I/O pin, a set of PWM output, no additional parts. SOP8 package.
2, Intel series CPU 8088 uses this form of packaging, Cache (Cache) and early memory chips are also this form of packaging. QFP Plastic square Flat Package and PFP plastic Flat component package QFP (Plastic Quad Flat Package) package the distance between the chip pins is small, the pins are very thin, and the general large-scale or ultra-large setThe circuit adopts this package form, and the number of pins is generally more than 100.
3. Flat package. One of the surface mount type packages. QFP or SOP (see QFP and SOP). Some semiconductor manufacturers use this name. 1flip-chip Inverse-welded chip. One of the bare chip packaging technologies, the metal convex points are made in the electrode area of the LSI chip, and then the metal convex points are pressed and welded to the electrode area on the printed substrate. The footprint of the package is basically the same as the chip size. It is the smallest and thinnest of all packaging technologies.
4, DIP (Dual in-line Package) package: DIP package is one of the earliest forms of chip packaging, it has two rows of pins, In a long strip. Common DIP package sizes are DIPDIP1DIP1DIP20, and the number indicates the number of pins. This package is suitable for manual welding on the PCB board. QFP (Quad Flat Package) package: QFP package has four sides, each side has a pin, in a flat shape.
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6, SOP8 package (small profile package) is a very common form of chip packaging, suitable for various types of chips, including voice chips. The voice chip packaged with SOP8 has the following advantages: small size: The SOP8 package chip area is only 9mm x 3mm, the thickness is about 5mm, the volume is very small, suitable for placing in the relatively small size of the product, making the whole product simple and lightweight.
Speech chip definition: the speech signal is converted into a number by sampling, stored in the ROM of the IC, and then through the circuit to restore the numbers in the ROM into a speech signal. The playback function of the ordinary voice chip is essentially a DAC process, while the ADC process data is completed by the computer, including the sampling, compression, EQ and other processing of the speech signal.
Voice chip refers to the IC that can store and control the playback of voice, also known as sound chip, audio ic. According to the voice chipThe output mode can be divided into two categories, one is PWM output mode, the other is DAC output mode. PWM output volume is not continuous adjustable, can not be connected to ordinary power amplifier, most of the voice chips on the market are PWM output mode. Generally used in smart home and security fields such as smart doorbell, alarm and other products.
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OTP voice chip (One-Time Programmable Voice Chip) : An OTP voice chip is a chip used to store and play back pre-recorded voice information. It usually has a small audio processor built in that can store and play back single or multiple speech clips. These voice clips can include digital speech, reminders, prompts, etc.
The most common words are used to regulate the playing and receiving of sound. For example, your own mp4, here the most important is the audio decoding chip and video decoding chip and memory chip if you want to put the first call memory chip dataIt's processed by an audio decoding chip before it's released. The recordings are also processed to be stored on a memory chip.