FRDM-K64F Code Share
A test for a digital envelope detector using a rectifier and a low-pass filter. The program first creates sample vectors for sinusoidal waves of 2Hz and 20Hz (considering 1kHz sampling frequency). Then, every 10ms it generates a new sample for a modulated wave (multiply both waves), and passes it through a full-wave rectifier and a Chebyshev low-pass filter with cutoff frequency of 5Hz. Then it sends the original wave and the recovered envelope through serial port in CSV format. I used 10ms interval instead of 1ms because otherwise the serial speed would have to be too high.
Dependencies: mbed
mbed.bld@0:1ba9469c839f, 2014-08-26 (annotated)
- Committer:
- quevedo
- Date:
- Tue Aug 26 17:02:29 2014 +0000
- Revision:
- 0:1ba9469c839f
Original program;
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| quevedo | 0:1ba9469c839f | 1 | http://mbed.org/users/mbed_official/code/mbed/builds/9327015d4013 |