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> Ideas for Design
Ideas for Design
Efficiently Design An Op-Amp Summer Circuit
The traditional inverting op-amp summer configuration exploits the feature of a low impedance node (virtual ground) at the inverting input. The summing circuit is straightforward and easy to analyze and use, though it does have some limitations.
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Dec 15, 2016
LED-String Driver Operates from Single Cell
This basic low-power driver, based on a few standard discrete components, can supply a variety of LED types and loads....
Nov 22, 2016
High-Voltage Amplifier Extends Coulomb-Counter Range to ±270 V
Low-range current (coulomb counting) measurement is a challenge when the associated voltage is relatively high, but a configuration of standard ICs meets the requirements....
Nov 15, 2016
Flip-Flop Design Provides Frame Sync for Received Satellite Telemetry
A string of D-flip flops configured as a counter can be used to establish the initial frame synchronization needed to decode satellite-telemetry data, which has been received and demodulated....
Oct 27, 2016
Diode's Analytical Model Bridges Solid-State Reality and Physics Theory
This model yields accurate analysis of silicon diodes, avoiding the complex iterative calculations for determining voltage drop across a diode....
Oct 3, 2016
Period-to-RPM Converter Measures Very Low Frequencies
Measuring long-period signals and translating them to low-frequency RPM is challenging, but a circuit built of medium-scale ICs will do so—without a microcontroller or firmware....
Sep 12, 2016
"Cap-Drop" Approach Implements Offline Power Supply for Light Loads
A transformerless ac-dc supply can provide dc power for light loads using a capacitor's reactions as a current-limiting element....
Sep 9, 2016
Added ADC Improves Analog Square-Root Extraction Accuracy
A standard circuit for extracting the square root of an analog signal has accuracy limitations, but adding some basic circuitry in a feedback topology can increase performance at low cost....
Sep 8, 2016
Simple Change Enhances Safety, Integrity of Isolated Shunt-Regulator DC-DC Converter
This Idea for Design rearranges the schematic and physical layout of an isolated dc-dc converter using a shunt regulator to overcome susceptibility to ESD and electrical overstress....
Aug 9, 2016
Hybrid Switching/Linear Method Yields LED-Current Controller with Wide Dimming Ratio
By using two basic power-supply topologies in conjunction, this circuit provides an easily controlled current source that is well-suited for dimming LEDs....
Jul 29, 2016
Circuit Enhancement Enables Digital Setting of Voltage Reference
By adding a digital potentiometer and ratiometric division to a voltage-reference IC's feedback loop, you can set the reference's output voltage using a digital code....
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Interview with Jawad Haider, Marvell Semiconductor
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