{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chapter+2

# chapter+2 - Ch 2 Filter 1 Goals Understand what filter is...

This preview shows pages 1–3. Sign up to view the full content.

Ch. 2. Filter 1. Goals Understand what filter is, and understand the characteristics and operating principles of RC filters and Tow-Thomas Biquad filters. 2. Objectives 1. Understand the characteristics and operating principles of a 1st order RC filters 2. Understand the characteristics and operating principles of a Tow-Thomas Biquad filters 3. Implement a 2nd order Tow-Thomas Biquad filter 3. Theory Filter is a circuitry used to pass or attenuate a certain frequency component of given information. It can be classified into low pass filter, high pass filter, band pass filter, and band stop filter according to its frequency characteristics and can be classified into passive filter and active filter according to its components. A passive filter comprises of passive components like capacitor, inductor, and resistors and, since inductors tend to take up large spaces, is difficult to implement in small scales. An active filter refers to a filter that includes OPAMP, an active component, as its component. A point where the power gain is halved in the frequency response of the filter is called a cutoff frequency. The voltage gain at this point is 1/ and is 3dB lower than the passband. Frequency band up to the cutoff frequency is called the bandwidth. First order filter refers to a filter with one pole and/or zero as can be represented by:

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
        (Eq. 2-1) A first order filter can change the location of pole and zero using only resistors and capacitors and can be implemented into an LPF or HPF as shown on table 1. Location of Pole/Zero Magnitude Response Implementation with passive components Transfer function dB w R C    dB w R C      Table 1 1st order passive filter Implementing a first order filter using only passive components, as shown on table 1, require a buffer at the output of the filter since the impedance of the upcoming stage affects the transfer function of the filter. Moreover, the gain of the
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 10

chapter+2 - Ch 2 Filter 1 Goals Understand what filter is...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online