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Convert negative inputs to positive outputs

Create a 3.3V source from a –5V supply. External Source

Twin-T power oscillators work as dc-biased ac sources

Using a frequency-selective twin-T network and the LT3080 linear regulator, you can achieve a low-distortion twin-T oscillator with power-driving capability. External Source

Diagnose LEDs by monitoring the switch-mode duty cycle

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Single pin controls relay, intermittent buzzer, and status LED

One pin controls relay, buzzer, and status LED for control applications. External Source

Simple two-transistor circuit lights LEDs

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Buck converter uses low-side PWM IC

A voltage-level shifter lets you control voltages above a PWM controller's power source. External Source

Isolated clock source acts as test generator

A cost-effective approach to implementing an isolated clock source uses a high-speed optocoupler with low input-to-output capacitance. External Source

Class AB inverting amp uses two floating-amplifier cells

Coupling optoisolators with one or more powerful discrete transistors yields almost-perfect floating-amplifier cells. External Source

DPGA conditions signals with negative time constant

With two op amps and three analog switches, you can build a programmable amplifier that conditions signals before digitizing. External Source

Instrumentation amplifier compensates system offset from single supply

An instrumentation amp operates from one supply and lets you reset the system offset by applying a positive correction voltage to the VREF input. External Source

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