Datasheet

2.0 Modes of Operation

The LMF100 is a switched capacitor (sampled data) filter. To

fully describe its transfer functions, a time domain analysis is

appropriate. Since this is cumbersome, and since the

LMF100 closely approximates continuous filters, the follow-

ing discussion is based on the well-known frequency do-

main. Each LMF100 can produce two full 2nd order func-

tions. See

Table 1

for a summary of the characteristics of the

various modes.

MODE 1: Notch 1, Bandpass, Lowpass Outputs:

notch

(See

Figure 7

)

MODE 1a: Non-Inverting BP, LP (See

Figure 8

)

Note: V

should be driven from a low impedance (

1kΩ) source.

DS005645-11

FIGURE 7. MODE 1

DS005645-4

FIGURE 8. MODE 1a

LMF100