FT93xRTC External Power Switch Circuit
Basic Electronics

FT93xRTC External Power Switch Circuit

This application note describes implementing a simple circuit for the FT930/FT931RTC external power supply switch. The Texas Instruments SN74AUC2G53 Single-Pole Double-Throw (SPDT) analog switch is used to select the power supplied by the 1.5V battery or by the 1.2V internal LDO. This...

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Simple fixture determines leakage of capacitors and semiconductor switches
Basic Electronics

Simple fixture determines leakage of capacitors and semiconductor switches

The circuit in Figure 1a comprises a voltage follower, IC1 , and the reference-voltage source of IC2. IC1 is an Analog Devices AD8661 op amp, which has a guaranteed input-bias current of no more than 1 pA and a typical input-bias current of 0.3 pA (Reference 1), and IC2 is an Analog...

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Power-handling capabilities of inductors
Basic Electronics

Power-handling capabilities of inductors

App note from Coilcraft on how to calculate the power dissipation of an inductor. Inductors are not typically rated by power, however an approximation of the power-handling capability of an air core or ceramic core chip inductor can be estimated using the data sheet specifications for...

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App note: Designing RC snubbers
Basic Electronics

App note: Designing RC snubbers

RLC snubber circuits, app note from Nexperia. This document describes the design of a simple “RC snubber circuit”. The snubber is used to suppress high-frequency oscillations associated with reverse recovery effects in power semiconductor applications App note: Designing RC...

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Free Elektor Circuit: Cable & Conduit Locator
Basic Electronics

Free Elektor Circuit: Cable & Conduit Locator

Apart from the risk of a (dangerous) electric shock and the near certainty of a very massive short circuit that is the consequence of drilling into a cable, the aftermath of this mishap is no fun either. In any case, the damaged cable has to be replaced – and that is already not nice...

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Fundamentals of MOSFET and IGBT Gate Driver Circuits
Basic Electronics

Fundamentals of MOSFET and IGBT Gate Driver Circuits

The main purpose of this application report is to demonstrate a systematic approach to design high-performance gate drive circuits for high-speed switching applications. It is an informative collection of topics offering a “one-stop-shopping” to solve the most common design...

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Low ESR tantalum capacitors make a difference in circuit designs
Basic Electronics

Low ESR tantalum capacitors make a difference in circuit designs

App note from Vishay about how ESR in tantalum capacitors affects circuit performance. Link here (PDF) When choosing a capacitor for any application, there are a few key characteristics that must be understood in order to analyze its suitability for the circuit. In a simple capacitor...

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Designing in MOSFETs for safe and reliable gate-drive operation
Basic Electronics

Designing in MOSFETs for safe and reliable gate-drive operation

The MOSFET gate-source threshold voltage (VGS-th) and maximum gate-source voltage(VGS-max) are key parameters that are critical to the reliable operation of MOSFETs. The threshold voltage represents the voltage at which the MOSFET starts to turn on, whilst the maximum gate-source...

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