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low-pass filter

The amplifier changes the signal strength by a factor gain, the low-pass filter eliminates the high-frequency components of the incoming signal, and the high-pass filter eliminates the low-frequency components of the signal.

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The amplifier, low-pass fil[t]er, and high-pass filter constraints show the input-output relationship of these components as the signal passes through them.

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In this example, a constraint block BinarySignalComponentConstraint defines the parameters for one input (ip) and one output (op), common to amplifiers, low-pass filters, and high-pass filters, as shown in Figure 51.

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The xi and scope properties have the PhSVariable stereotype applied, specifying that their values might vary during simulation.

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The amp, alpha and g properties have the PhSConstant stereotype applied, specifying that their values are constant during each simulation run.

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The amplifier, filters (high-pass and low-pass), signal source, and signal sink have properties g, alpha and xi, amp, and scope, respectively.

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In Figure 50, amplifiers, low-pass filters, and high-pass filters, each have an input and an output. Since they are similar in this sense, a generalized TwoPinSignalComponent component has an input u and an output y.

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Figure 49-Figure 50 show block definitions for components of TestBed and SignalProcessor in Figure 47 and Figure 48, respectively.

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Figure 47 shows an initial value for source amplitude amp, while Figure 48 shows initial values for amplifier signal gain g and filtering properties xi and alpha ...

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A.3.2 System being modeled The signal processor and its testbed have a wave generator, an amplifier, high-pass and low-pass frequency filters, a mixer, and a signal sink, see Figure 46.

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