STMicroelectronics’ TSZ181H1 and dual TSZ182H1 automotive-qualified operational amplifiers (op amps) deliver high accuracy and stability over a wide (-40° to 175° C) temperature range. The high maximum operating temperature encourages use in harsh environments and in applications with long mission profiles. The op amps have very low input offset voltage, typically 3.5µV at 25° Cm, and input bias…
STMicroelectronics releases automotive high-side gate drivers
STMicroelectronics has released single, double, and four-channel automotive high-side gate drivers in a common PowerSSO-16 package style, with pin assignments that simplify scaling circuit designs to add more driver channels. The gate drivers target applications throughout the vehicle, including safety, comfort, powertrain, body electronics, infotainment, and driver-assistance systems. Meeting the automotive industry’s LV124 test schedule for…
Infineon’s new audio amplifiers feature MERUS multilevel switching amplifier
When designing portable and battery-powered audio devices for consumer speaker applications, maximizing battery playback time and maintaining excellent audio performance in a compact form and at a low-system cost is essential. MERUS multilevel switching technology from Infineon Technologies is designed to achieve low switching losses and highly efficient amplification at both low and high output…
Diodes releases automotive-compliant precision op-amps
Diodes Incorporated is addressing the need for advanced signal conditioning in modern automotive designs by introducing two precision operational amplifiers (op-amps) aimed at different signal frequency scenarios. The low signal-to-noise ratio characteristics of the DIODES AS2376Q mean it is optimized for high-frequency use, such as in onboard chargers (OBCs), DC-DC converters, battery-management system (BMS) implementations,…
STMicroelectronics’ new dual high-output amplifier offers simplified circuitry
The STMicroelectronics TSB582 dual high-output amplifier simplifies circuitry for driving inductive and low-ohmic loads like motors, valves, and rotary resolvers in industrial applications and automotive systems such as steer-by-wire and auto-parking. The TSB582 operates from 4 to 36V supplies and contains two operational amplifiers (op amps), each capable of sinking/sourcing up to 200mA. This enables direct connection…
STMicroelectronics’ flexible new op amp ideal for automotive and industrial applications
The STMicroelectronics‘ TSB622 general-purpose, low-power, dual-operational amplifier (op amp) enhances ruggedness and flexibility in industrial and automotive applications. The unity-gain stable TSB622 operates over the extended temperature range (between -40° to 125° C) and is automotive-qualified. The broad supply-voltage range, from 2.7 to 36V, lets designers use the same device for multiple applications with different…
STMicroelectronics’ new automotive amplifier supports high-definition audio
STMicroelectronics’ TDA7901 automotive amplifier integrates a buck controller for class-G power switching and supports high-definition audio — a market-unique combination for ideal listening and high efficiency. In class-G operation, the TDA7901 buck controller automatically optimizes the voltage supplied to the bridge-tied load (BTL) power-stage, depending on the audio-signal level. The resulting smooth, analog sound comes with…
STMicroelectronics adds to its low-power, operational amplifier line
The STMicroelectronics‘ TSV772 dual-operational amplifier (op amp) combines high accuracy, low power consumption, and the option of an extremely small 2.0 x 2.0mm DFN8 package. Extending ST’s high-performance 5V op-amp family, the TSV772 has rail-to-rail inputs and outputs, 20MHz gain-bandwidth (GBW), and is unity-gain stable. With a slew rate of 13V/µs, 7nV/√Hz input noise density,…
Infineon introduces MERUS Class D, an audio amplifier multichip module
Unlocking the potential of its best-in-class power MOSFET technology, Infineon Technologies is introducing the MERUS 2-channel, analog input, class D audio amplifier multichip module (MCM) MA5332MS. Class D audio power amplifiers offer a combination of small size, low heat dissipation, high integration, and excellent sound quality. The new module is a powerful upgrade to its predecessor,…
Microchip expands its gallium-nitride RF power portfolio
Microchip Technology Inc. recently announced a significant expansion of its gallium-nitride (GaN), radio-frequency (RF). power-device portfolio with new MMICs and discrete transistors that cover frequencies up to 20 gigahertz (GHz). The devices combine high power-added efficiency (PAE) and high linearity to deliver new levels of performance in applications — ranging from 5G to electronic warfare, satellite communications, commercial…
Diodes launches high-efficiency, class-D stereo audio amplifier
Diodes Incorporated is introducing the PAM8965 class-D stereo, audio power amplifier with an integrated synchronous boost converter. This high-efficiency device is targeted for use in AI-enabled speaker systems and portable musical instruments where elevated output power, extended battery life, and compact construction are all key requirements. Running off a 2.8 to 8.5V supply, the PAM8965…
STMicroelectronics enhances automation with new, single-chip GaN gate driver
STMicroelectronics’ new STDRIVEG600 half-bridge gate driver is a high-current output and 45ns propagation delay. This offers a close match between the high and low-side outputs to, ideally, handle high-frequency switching of GaN enhancement-mode FETs. Also suitable for driving N-channel silicon MOSFETs at up to 20V, the STDRIVEG600 allows the flexibility to apply up to 6V…
Op-amp Tutorial 2 : Features of inverting and non-inverting input and application
Features of inverting and non-inverting pins The dependency of the output with the inverting and non-inverting pin can be simply explained as below, If the inverting pin is high compared to other pin, the output is negative If the non-inverting pin is high compared to other pin, the output is positive This pecularity of…
Op-amp Tutorial 3 : Astable multivibrator, negative feedback
Astable multivibrator using op amp Astable multivibrator is an electronic device which can continuously shift between its two states with respect to the output. If the output corresponding to one particular state is high, then the output corresponding to the other state is low. This nature of the circuit is useful in producing continuous output…
Op-amp Tutorial 4 : voltage follower, loudness & level indicator, comparato
Op amp as a Voltage follower Voltage follower is a negative feedback op-amp amplifier circuit. It acts like emitter follower configuration of transistor based amplifiers. They provide unity gain to the applied input signals. Unity gain means the output voltage will be exactly equal in magnitude with the input voltage. Fig. 1: Circuit Diagram of…
Mircrochip launches GaN MMIC power amplifier
Satellite communication systems use complex modulation schemes to achieve the blazingly fast data rates required to deliver video and broadband data. To attain this, they must deliver high RF output power while simultaneously ensuring the signals retain their desired characteristics. The new GMICP2731-10 GaN MMIC power amplifier from Microchip Technology helps meet both of these…
Amplifier for Musical ICs
We use musical IC UM66, UM3456, M3481 etc for many applications like for door bell, as an indicator for reversing car, for vehicle turning indicator, burglar alarms, intruder alarm and many more. Sometime it happen that sound from the IC is very slow and you are not able to hear it properly because of various kind of noise around your home or offices. Therefore to amplify sound signal you can use this simple circuit. This will amplify the musical sound so that you can hear it properly and from distance also. In this circuit we have amplify the musical sound of UM66 IC you can use any other IC also. Apart from UM 66, this circuit also uses LM 386 in order to make it work. Continue reading to find out how the circuit is assembled and how it works.
Audio Amplifier using Opam
LM386 is a low power voltage amplifier IC by National Semiconductors. Specifically designed for low power applications, it provides an internal gain of 20 which [[wysiwyg_imageupload::]]can be easily shoot to 200 using a resistor. This IC has been developed for battery operations and is widely used in circuits such as intercoms, audio systems in televisions, power connectors etc.The circuit described here is based on LM386 which amplifies sound input so that they can suffice enough for interiors of a car or a mobile phone. Fairly compatible, this circuit is widely used commercially. Read on more to find out how the circuit is made and how it works.
555 Timer As Amplifier
In its most simplistic form an amplifier can be built with a single 555 timer. The project is based on the concept of condenser MIC. The MIC is used as sensors to sense the incoming audio signals and convert them to appropriate electrical signals. In this project, a 200mA of current capability is enough to drive a small speaker, which makes it a good replacement for a low power amplifier. But when more power is needed to allow listening music in a small room then a high power stage needs to be added with it.The function of 555 timer is very much comparable to pulse width modulation (PWM). The value of the component used in the circuit causes 555 to oscillate at approximately 66 KHz. As we know, speaker does not respond to this much high frequency. Instead it responses to the usual CD value of the modulated output and explains the concept of PWM.
Audio amplifier using transistor
The microphone converts the mechanical vibrations into electrical signals but the amplitude of these signals is not enough to drive a speaker. In this project, these [[wysiwyg_imageupload::]]signals are amplified before connecting to the speaker.Facts about the type of transistor used in the circuit: 1. This circuit is based around transistor BC 547, an NPN transistor. 2. Providing a maximum gain of 800, this transistor is widely used in amplification and switching circuits.3. The transistor shows highly stable working at quiescent point (Q-point) once properly biased using a DC source.Read more to find out how the circuit is constructed and how it works.