For an op amp, 34dB is a less than ideal CMRR. However, a feedback network of 1% tolerance resistors can limit the CMRR to 34dB regardless of the op amp’s capabilities. Highly matched resistors, such ...

The circuit of Figure 1 shows a simple single-supply biasing method. This noninverting, ac-coupled, amplifier circuit uses a resistor divider with two biasing resistors, R A and R B, to set the ...

Q11 and Q12 bases are connected to the input pins via 1kΩ safety resistors. In a typical op-amp, the collectors of Q11 and Q12 would be connected to a current mirror – as they are in the classic LM358 ...

If you’ve ever wondered why an op amp has the little plus and minus symbols on it, its because at the heart of it, the device is a differential amplifier. The problem is that — ideally,… ...

A simple linear voltage-controlled amplifier can be constructed with one op amp and two JFETs (see the figure). The amplifier can achieve an 80-dB dynamic control range with less than ±0.2% ...

4. An improved multiple-input op-amp summer can be analyzed more easily than the one in Figure 3. This is because the general design equation can be expressed more simply (Equation 4).