next up previous contents
Next: Approximate Differentiator Up: Passive RC Filters Previous: Approximate Integrater

High-Pass Filter

Figure 3.3 shows one possible high-pass filter. Mathematically we can write

Figure 3.3:  RC high-pass filter.

At low and high frequencies

At the corner frequency we have

and therefore

Doug Gingrich
Tue Jul 13 16:55:15 EDT 1999