SX Specific Digital Frequency Synthesis

• Artificial Sine Generation (PFM)
  • Source: art_sine_gen.src
  • Application note: an11.pdf CCS HTML 09/29/00
     
• Sine Waves a non-table based approach for higher resolution, variable frequency generation in less program space.
   
• SX52 based audo recorder / player with MMC FLASH memory

See:

• DTMF
• PWM
• FSK
• SX "Virtual" Modems
• SX "Virtual" Video

Also:

• Digital to Analog Converters
• Virtual Peripherals
• Electronics Bench in a Box

See also:

• Digital Frequency Synthesizer

  Richard Ottosen has developed a version of the Digital Frequency Synthesizer described in Tom Napier's article "Digital Frequency Synthesis" in issue 99 (October 1998) of Circuit Cellar INK (http://www.edtn.com/embapps/emba057.htm). The frequency is set by a serial input and can varied from less than 1Hz to over 500KHz.

  • http://www.rhoent.com/ncoman.pdf
  • http://www.rhoent.com/sxncoex.zip (cached 19990614)
     

• Direct Digital Frequency Synthesizer

  Richard Ottosen has developed an improved version of the Digital Frequency Synthesizer described in Tom Napier's article "Digital Frequency Synthesis" in issue 99 (October 1998) of Circuit Cellar INK (http://www.edtn.com/embapps/emba057.htm). It uses direct digital synthesis (DDS) to generate sine, triangle and square waveforms. The frequency, waveform and amplitude are all set numerically. The frequency can be varied from less than 1Hz to over 500KHz. The amplitude can be a few millivolts to a few volts.

  • http://www.rhoent.com/ddsman.pdf
  • http://www.rhoent.com/sxddsex.zip (cached 20000330)