Exam 15: Active Filters

Figure 1 Stage 1: DF = 1.848 and R₁/R₂ = 0.152; stage 2: DF = 0.765 and R₃/R₄ =1.235. -Refer to Figure 1 with values as given. R3 should have a value of

The damping factor, DF, affects an active filter's response characteristics.

The Chebyshev filter is noted for its flat response in the passband.

The critical frequency of a high- pass filter is where the response is

A high Q bandpass filter

The biquad filter has

The Q of a band- pass filter is inversely proportional to the damping factor.

A basic RC (one R, oneC)filter has a -20dB/decade roll- off.

Figure 4 A test of a filter using an oscilloscope -Refer to Figure 4. The signal on the X channel of the oscilloscope is a(n)

Figure 4 A test of a filter using an oscilloscope -Refer to Figure 4. The input signal to the filter (Vin)is a(n)

Figure 1 Stage 1: DF = 1.848 and R₁/R₂ = 0.152; stage 2: DF = 0.765 and R₃/R₄ =1.235. -Refer to Figure 1. Assume Vin = 1.0 Vpp sine wave at 20 kHz. At this frequency, Vout is approximately

Figure 1 Stage 1: DF = 1.848 and R₁/R₂ = 0.152; stage 2: DF = 0.765 and R₃/R₄ =1.235. -Refer to Figure 1 with values as given. R1 should have a value of

Figure 3 -Refer to Figure 3. The last stage is

The bandwidth of a basic band- pass filter is measured between the center frequency and a critical frequency.

Figure 2 Note that the capacitors have different values. -Refer to Figure 2. Assume section 1 and section 2 are exchanged. This will