Automatic Shutdown Circuit
DS012343-3
FIGURE 2. Automatic Shutdown Circuit
Automatic Switching Circuit
DS012343-4
FIGURE 3. Automatic Switching Circuit
External Components Description (Figure 1)
Components
Functional Description
Inverting input resistance which sets the closed-loop gain in conjunction with RF. This resistor
1.
2.
Ri
=
also forms a high pass filter with Ci at fc 1/(2πRiCi).
Ci
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also
=
creates a high pass filter with Ri at fc 1/(2πRiCi). Refer to the section, Proper Selection of
External Components, for an explanation of how to determine the value of Ci.
3.
RF
Feedback resistance which sets closed-loop gain in conjunction with Ri.
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4
NSC [ National Semiconductor ]
