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resources:tools-software:sigmastudio:toolbox:sources:pulse [23 May 2018 07:31] Venkatesan Krishnamoorthy Minor typos corrected. |
resources:tools-software:sigmastudio:toolbox:sources:pulse [02 Jun 2021 15:23] Joshua Berlin Rewrite of page; fix errors in frequency formula |
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| - | ===== Pulse ===== | + | ===== Voltage Controlled Pulse ===== |
| [[:resources:tools-software:sigmastudio:toolbox:sources|Click here to return to the Sources section.]] | [[:resources:tools-software:sigmastudio:toolbox:sources|Click here to return to the Sources section.]] | ||
| - | The Pulse block typically used for modulation applications takes the control input from Pin0 and duty cycle input from pin1 and it generates the output pulse from pin2. | + | The Pulse block generates a pulse train with the values 0 and 1. There are two inputs to this cell: Frequency and Duty Cycle. |
| - | The input pin0 value from zero to one vary the output signal time period(frequency) and the input pin1 value from zero to one vary the T-ON(Duty cycle) of the pulse. | + | |
| - | + | Frequency is an 8.24 number between 0 and 0.5. An input of 0 will create DC, and 0.5 will create Fs/2. | |
| - | A tiny circle is used to round/unround the no of the samples in T-OFF period of pulse signal). | + | For example, at Fs = 48 kHz, a frequency input of 0.1 will create a 4.8 kHz pulse train. |
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| + | Duty cycle is an 8.24 number between 0 and 1, corresponding to 0% and 100%. | ||
| + | A duty cycle of 0.6 will create a pulse train which has value 1 60% of the time. | ||
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| + | Note that since the Pulse block runs at a discrete sampling rate, exact frequency generation is not always possible. A mechanism called "Round Coefficients" approximates the requested frequency more closely by following some short pulses with longer pulses at the closest possible frequencies. | ||
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| + | The "Round Coefficients" feature is enabled/disabled with a small circle on the window. When the circle is BLUE, coefficients are rounded. When the circle is ORANGE, the rounding feature is disabled. | ||
| {{ :resources:tools-software:sigmastudio:toolbox:sources:pulse.png?nolink|}} | {{ :resources:tools-software:sigmastudio:toolbox:sources:pulse.png?nolink|}} | ||
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| ===== Supported IC's===== | ===== Supported IC's===== | ||
| - | 1. ADAU145x | + | ADAU145x and ADAU146x processors are supported. |
| ===== Example ====== | ===== Example ====== | ||
| - | The example shown below generates the 5KHz pulse with duty cycle 50% | + | The schematic below generates a 4.8 kHz pulse with 50% duty cycle. |
| - | {{ :resources:tools-software:sigmastudio:toolbox:sources:pulseexample1.png?nolink |}} | + | {{ :resources:tools-software:sigmastudio:toolbox:sources:pulse_sigmastudio_project.png?nolink |}} |
resources/tools-software/sigmastudio/toolbox/sources/pulse.txt · Last modified: 02 Jun 2021 15:23 by Joshua Berlin