For pulsed applications, where the signal is at ground and pulses to a positive or negative voltage, the circuit bias-voltage considerations differ from those in an application with a signal that swings symmetrical about a reference point. Figure 9-7 shows a circuit where the signal is at ground (0 V) and pulses to a positive value.

Figure 9-7 Noninverting Single Supply With Pulse

If the input signal pulses negative from ground, an inverting amplifier is more appropriate as shown in Figure 9-8. A key consideration in noninverting and inverting cases is that the input and output voltages are kept within the limits of the amplifier. Because the V_ICR of the OPA836 device includes the negative supply rail, the OPA836 operational amplifier is well-suited to this application.

Figure 9-8 Inverting Single Supply With Pulse