Design Ideas

More Design Ideas

Perform the XOR/XNOR function with a diode bridge and a transistor

Remember DTL? These discrete DTL-like circuits let you implement the XOR and XNOR operations with a minimum of components. Read More...

Use an op amp as a set/reset flip-flop

Eliminate a flip-flop package by using a spare op amp for an SR latch function. Read More...

Generate a pulse width that is inversely proportional to the square root of an analog voltage

This non-retriggerable monostable circuit performs analog conversion of a mathemetical function to time. Read More...

Power-supply decoupler protects your UUT

Detect and shutdown reverse polarity or overvoltage before damage occurs. Read More...

Build a digital PLL with three ICs

A counter’s self-presetting feedback loop hunts for the center count. Read More...

Signal-powered switch connects devices

Use a switch to selectively connect a terminal, personal computer, or any other originating device to one of four receivers. Read More...

Convert 1 to 5V signal to 4- to 20-mA output

Precision analog current loop converter uses a matched resistor network. Read More...

Linearize optical distance sensors with a voltage-to-frequency converter

Create the mathematical inverse of an analog voltage by converting it to frequency and measuring the period. Read More...

Use a transistor as a heater

A temperature sensor and a hot transistor hold biological samples at a preset temperature. Read More...

Monitor circuit conserves battery energy

Use a sampled-data technique to lower a monitor circuit’s average power consumption. Read More...

Lamps monitor beat frequency

Synchronize an unknown frequency with a reference to obtain a zero beat by employing a visual monitor for the audio gap surrounding the near-zero Read More...

Use a three-phase rectifier and voltage reducer for offline single-phase supplies

Missing diodes create gaps to allow voltage reduction. Read More...

Simple circuit lets you characterize JFETs

Measure the pinch-off voltage Vp and zero-bias drain current Idss to select matched pairs of JFETs. Read More...

Use a transistor and an ammeter to measure inductance

Bipolar junction transistors transfer a current from a lower-resistance emitter to a higher-resistance collector. You can use this property to Read More...

Condenser microphone uses dc-coupled impedance converter

Eliminate transformers and coupling capacitors in this self-balancing microphone interface. Read More...

Simple sawtooth generator operates at high frequency

Use a digital logic gate to generate an analog waveform. Read More...

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