Free Simple Circuit Diagram
This low noise audio power supply circuit can reduces noise and ripple voltage by 40dB over the 100Hz to 20kHz audio range. In portable application such as cellular phones and multimedia notebook computers, a clean source of 5V power for driving audio circuits can be provided by this circuit. Noise up to 1000Hz or so is rejected by most linear […]
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Powering the system is required by many applications while charging the battery simultaneously. Interaction between the system and charger may result in a false charge stoppage caused by the safety timer when the system is directly connected to the battery-charge output. The circuit diagram below shows a typical application circuit that removes such issues. This circuit has two independent power […]
Read moreDC/DC step-up converter is applicable on battery-powered equipment. DC/DC step-up converter can be used to generate supply voltages for internal circuits that require higher voltages than the available battery voltage. There’s two kind of converters, inductive and capacitive. Inductive step-up converters have a high efficiency over the entire input voltage range. Capacitive converters-i.e., charge pumps give us a high efficiency […]
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THE FM3954 monolithic-dual gives us an ideal low-offset and acts as low-drift buffer function for the LM101A op amp. Track over it’s bias current range thus improving common mode rejection is the excellent matching characteristics of the FM3954. Here’s the circuit diagram: [Source: National Semiconductor Application Note]
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