Difference between revisions of "An Overview of System-Level Macromodeling Using Virtual Blocks"
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== An Introduction to Macromodeling == | == An Introduction to Macromodeling == | ||
| − | [[RF.Spice A/D]] provides an extensive library of black-box virtual blocks that allow you to quickly test and verify new system concepts without getting into the details of particular circuit realizations. A virtual block typically has one or more input pins and one or more output pins. | + | [[RF.Spice A/D]] provides an extensive library of black-box virtual blocks that allow you to quickly test and verify new system concepts without getting into the details of particular circuit realizations. A virtual block typically has one or more input pins and one or more output pins. A system-level function or behavior is modeled by the relationship between the input and output voltages. For example, a multiplier block takes two input voltages and outputs their product. An analog frequency doubler takes a single sinusoidal input voltage and produces a sinusoidal output voltage, whose frequency is twice as large as the input frequency. |
| + | |||
| + | == Example 1: Analog Signal Differentiation == | ||
| + | |||
| + | The simplest voltage differentiator can be made based on the basic properties of a capacitor: | ||
| + | |||
| + | <math> i(t) = C \frac{dv}{dt} </math> | ||
| + | |||
| + | where v(t) and i(t) are the voltage and current of the capacitor and C is it capacitance. Similarly for an inductor, one can write: | ||
| + | |||
| + | <math> v(t) = L \frac{di}{dt} </math> | ||
| + | |||
| + | where L is the inductance. | ||
<p> </p> | <p> </p> | ||
[[Image:Back_icon.png|40px]] '''[[RF.Spice_A/D | Back to RF.Spice A/D Wiki Gateway]]''' | [[Image:Back_icon.png|40px]] '''[[RF.Spice_A/D | Back to RF.Spice A/D Wiki Gateway]]''' | ||
Revision as of 14:39, 18 August 2015
An Introduction to Macromodeling
RF.Spice A/D provides an extensive library of black-box virtual blocks that allow you to quickly test and verify new system concepts without getting into the details of particular circuit realizations. A virtual block typically has one or more input pins and one or more output pins. A system-level function or behavior is modeled by the relationship between the input and output voltages. For example, a multiplier block takes two input voltages and outputs their product. An analog frequency doubler takes a single sinusoidal input voltage and produces a sinusoidal output voltage, whose frequency is twice as large as the input frequency.
Example 1: Analog Signal Differentiation
The simplest voltage differentiator can be made based on the basic properties of a capacitor:
[math] i(t) = C \frac{dv}{dt} [/math]
where v(t) and i(t) are the voltage and current of the capacitor and C is it capacitance. Similarly for an inductor, one can write:
[math] v(t) = L \frac{di}{dt} [/math]
where L is the inductance.
