المنتجات

This PT2315E IC-based audio processor is designed for versatile applications and includes master volume control with low-frequency loudness compensation, speaker output attenuator, and tone control. It is a good solution for home audio signal processing. Due to the high-reliability requirement from the audio business, the PT2315E improves both audio performances and input surge current capability and these cause the PT2315E to be the best solution for the cost-effective audio systems.

The project described here is a differential line receiver consisting of high-performance INA134 OPAMPs with on-chip precision resistors. The project is fully specified for high-performance audio applications and has excellent AC specifications, including low distortion (0.0005% at 1kHz) and high slew rate (14V/µs), assuring good dynamic response. In addition, wide output voltage swing and high output drive capability allow use in a wide variety of demanding applications. The INA134 on-chip resistors are laser trimmed for accurate gain and optimum common-mode rejection. Furthermore, excellent TCR tracking of the resistors maintains gain accuracy and common-mode rejection over temperature. Operating power supply ±4V to ±18V (8V to 36V total supply).

The board presented here is a preamplifier for contact microphones that are used for amplifying the sound of musical instruments which do not contain electrical pickups, such as guitar and violins. Most contact microphones use a piezo element to convert vibration in the body of the musical instrument to a voltage. The circuit is built using OPA1678 OPAMP. The low noise and low input bias current of the OPA1678 makes the device an excellent choice for high impedance preamplifiers for piezo elements. This preamplifier circuit provides high input impedance for the piezo element but has low output impedance for driving long cable runs. It provides a balanced audio output that can be fed to a balanced microphone pre-amplifier. The circuit has also the option for phantom power input. Install R3=1.2K Ohms, R2=1.2K Ohm and Zener diode 24V.

The project shown here is a microphone preamplifier that provides high quality amplification, optimized for use in computers, media and mobile applications. The pre-amplifier provides a differential input stage, making the device particularly effective when layout constraints force the microphone amplifier to be physically remote from the ECM microphone. This project features adjustable gain using PR1 trimmer potentiometer, very high power-supply rejection (95dB), and common-mode rejection (79dB), making it ideal for low-noise applications. Board is provided with condenser microphone as well as connector to connect external microphone, selection of external or internal microphone is possible with the help of on board Jumper. Circuit requires 5V DC input. The circuit provides differential output, use +OP/GND for single ended output. External microphone gain can be changed using R5.

This low cost low voltage 3W class-D stereo amplifier is based on PAM8403 IC, The PAM8403 is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to achieve high-quality sound reproduction. The new filter-less architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area. With the same numbers of external components, the efficiency of the PAM8403 is much better than that of Class-AB cousins. It can extend the battery life, which makes it well-suited for portable applications. Trimmer Potentiometer helps to adjust the volume control, CN1 provided to feed the audio signal, CN2 power supply, Mute and shutdown in, LS1 and LS2 to connect the speaker. Shutdown and Mute pin required high level signal input, and can be connect to VDD power pins for normal operation, can be connect to GND for shutdown or mute the audio. The amplifier works well with standard audio signal input.

The project presented here is a differential output amplifier that converts a single-ended audio signal input to a balanced output pair. This balanced audio project consists of high-performance OPAMPS with on-chip precision resistors. They are fully specified for high-performance audio applications and have excellent AC specifications, including low distortion (0.0005% at 1 kHz) and high slew rate (15 V/µs). The board is based on DRV135 from Texas Instruments.

This is a low noise Headphone Amplifier capable of delivering 105mW per channel of continuous average power into a 16Ω load with 0.1% (THD+N) from a 5V power supply. The project is based on the LM4811 chip from the boomer series. The board provides high-quality output power with a minimal number of external components. It features a digital volume control that sets the amplifier’s gain from +12dB to −33dB in 16 discrete steps using a two−wire interface or onboard 3 tactile switches. On-board jumper implements the shutdown feature. The chip also has an internal thermal shutdown protection mechanism.

This is a Hi-Efficient 20W mono Class-D audio amplifier, designed to drive speakers as low as 4 ohms in a bridge-tied-load configuration. Due to the low power dissipation and high efficiency of up to 90%, the module doesn’t require a heatsink. The project is built using PAM8320 chip which features short circuit protection, thermal shutdown, over-voltage protection and under-voltage lock-out. Ferrite-Bead is provided on the output of the speaker connection to eliminate EMI. Connect SD to a high and MUTE to a low for normal operation.

The project presented here is a 3D sound processor, that regenerates 3D sound to stereo speakers. The board is able to regenerate 3D sound from a stereo audio input. It features of wide operating voltage range, wide dynamic range, and low output noise and is suitable for any audio application. This tiny module can add 3D sound effects to your next project. Basically, this mini low-cost module converts a stereo audio signal into 3D effect audio and it is based on PT2387 chip. The chip features a specially designed PTC HRTFs filter and with its space-enhanced circuit, it provides excellent audio quality and performance. The module provides excellent 3D effect audio output from a stereo audio source and a built-in LED display when the 3D sound effect is active. A tactile switch is provided to activate the 3D sound effect.

The voice echo or digital delay sound effects project presented here is suitable for applications such as Karaoke, multimedia, musical instrument effects, electronics toys, animatronics, etc. The project is based on PT2399 chip, with an operating supply of 5V DC, and approx. 30mA current consumption. Two potentiometers are provided to set the delay and repeat. The delay range is adjustable from 50ms to 280ms.

This Ground Isolation Amplifier is developed for car and automotive applications. The board efficiently eliminates problems caused by wiring resistance and removes noise generated by other electrical devices used in automobile environment. In a car or automotive the audio system is grounded to the car body. For this reason, electrical noise generated by the car electrical system can enter the power amplifier input through the chassis and become audible. The BA3123F utilizes the common-mode rejection characteristics of an OPAMP to eliminate this noise. 4 x RCA connectors are provided for easy audio interface. 2x pin header connector is provided for chassis ground.

The project presented here is a differential line receiver that offers unparalleled high-speed, low-distortion performance and is ideally suited for digital, video, and RF signal-processing applications. These receivers offer a small-signal bandwidth of 550MHz and have a high slew rate of up to 2000-3800V/µs. The board’s 120mA output capability allows it to be directly coupled to data acquisition systems. The project has been designed using the MAX4445 chip, which has a three-op amp instrumentation amplifier architecture. These ICs have symmetrical differential inputs and a single-ended output. The project operates from ±5V supply and is capable of driving a 100Ω load to ±3.7V.  MAX4445 is compensated for gains of +2V/V or greater, set by an external resistor R3. A low-power enable mode reduces current consumption to 3.5mA. Using current-feedback techniques, the MAX4445 achieves a 550MHz bandwidth while maintaining up to a 5000V/µs slew rate. Excellent differential gain/phase and noise specifications make these amplifiers ideal for a wide variety of digital, video, and RF signal-processing applications. It is important to make a Gold-plated high-quality PCB and use high-grade components and connectors to operate at high frequency.