Design Ideas interface to precision circuits

Chop the noise gain to measure an op amp’s real-time offset voltage introduces a new type of chopping. "Chopping the noise gain" is a simple way to measure the offset voltage in real time, so that you can subtract it and enhance DC precision.

The circuit in Simple analog circuit provides voltage clipping and dc shifting for flash ADC converts a symmetrical inputvoltage range of 20.2 to 10.2V into the recommended 0.6 to 2.6V range of an ADC. The circuit also prevents the output voltage from going below –0.3V, which would probably damage the ADC.

Compact laser-diode driver provides protection for precision-instrument use details a compact, cathode grounded laser-diode driver with protection against ESD (electrostatic-discharge) damage, start-up spikes, overshoot, and possible fluctuation arising from external optical feedback.

The basis for Current source makes novel Class A buffer is a classic two-transistor current source. Typically, this circuit finds use as a steady current source or as a limiter. The classic circuit forms the amplifier for the upper, positive half of the signal. Adding a complementary stage for the lower, negative half of the signal completes the buffer.