An ideal operational amplifier (op-amp) is described by infinite bandwidth and infinite slew rate. Explain what is meant by infinite bandwidth.
Explain the meaning of infinite slew rate.
An ideal op-amp is included in the circuit of Fig. 8.1. Determine the resistance $R_T$ of the thermistor $T$ for which the output potential difference $V_{\text{OUT}}$ is zero.
As the thermistor is heated slowly, its resistance drops from $1.5R_T$ to $0.5R_T$. On Fig. 8.2, draw a line to indicate how the output potential difference $V_{\text{OUT}}$ varies with the thermistor resistance.
On Fig. 8.1, draw the symbol for a light-emitting diode (LED) at the circuit output so that it emits light when the thermistor resistance is less than $R_T$.
As the thermistor is heated slowly, its resistance falls from $1.5R_T$ to $0.5R_T$. On Fig. 8.2, draw a line to show how the output potential difference $V_{\text{OUT}}$ varies with thermistor resistance.
On Fig. 8.1, draw the symbol for a light-emitting diode (LED) at the circuit output so that it emits light when the thermistor resistance is less than $R_T$.