This version (02 Jun 2021 15:23) was approved by Joshua Berlin.The Previously approved version (23 May 2018 07:31) is available.
Table of Contents
Voltage Controlled Pulse
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The Pulse block generates a pulse train with the values 0 and 1. There are two inputs to this cell: Frequency and Duty Cycle.
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. For example, at Fs = 48 kHz, a frequency input of 0.1 will create a 4.8 kHz pulse train.
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.
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.
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.
Input Pins
| Name | Format [int/dec/float] - [control/audio] | Function Description |
|---|---|---|
| Pin 0: Input | decimal- Control | Control signal to the module to vary the frequency of the pulse |
| Pin 1: Input | decimal- Control | control signal to the module to vary the duty cycle of the pulse |
Output Pins
| Name | Format [int/dec/float] - [control/audio] | Function Description |
|---|---|---|
| Pin 0: Output | decimal - audio | Output pulse signal from the module |
GUI Controls
| GUI Control Name | Default Value | Range | Function Description |
|---|---|---|---|
| isRounded | 0 | 0 -1 | To select Round or un round the coefficients(which will control first cycle no of samples of TOFF of pulse |
DSP Parameter Information
| GUI Control Name | Compiler Name | Function Description |
|---|---|---|
| isRounded | PulseAlg_withInputPinS3001isRounded | To round/unround the no of samples T-OFF period of Pulse |
Here,
- Green - Algorithm Name
- Red - Instance Number (Changes for each instance)
- Blue - Parameter Name
Supported IC's
ADAU145x and ADAU146x processors are supported.
Example
The schematic below generates a 4.8 kHz pulse with 50% duty cycle.
resources/tools-software/sigmastudio/toolbox/sources/pulse.txt · Last modified: 02 Jun 2021 15:23 by Joshua Berlin