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paper_bits:pb109_vcoii [2019/07/09 15:14]
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paper_bits:pb109_vcoii [2019/07/31 22:16]
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 ===== PB109 VCO II ===== ===== PB109 VCO II =====
  
-An other voltage controlled oscillator. It comes with a really beautifull shaped sinewave - stabel and with the same peak to peak over all frequencies. One can switch between square, triangle and sine wave. In the square/​triangle mode one can change with a potentiometer from triangle to saw or the duty cycle of the square wave. In sine wave mode one can shape the sine wave to an interesting "sea saw" wave.\\+An other voltage controlled oscillator. It comes with a really beautifull shaped sinewave - stabel and with the same peak to peak over all frequencies. One can switch between square, triangle and sine wave. In the square/​triangle mode one can change with a potentiometer from triangle to sawtooth wave or change ​the duty cycle of the square wave. In sine wave mode one can shape the sine wave to an interesting "sea saw" wave.\\
 All OpAmps are the rail to rail [[http://​ww1.microchip.com/​downloads/​en/​DeviceDoc/​21733j.pdf|MCP6002]] ICs. For a perfect sine wave one should trim the 500R trim potentimeter to a symetrically wave.\\ All OpAmps are the rail to rail [[http://​ww1.microchip.com/​downloads/​en/​DeviceDoc/​21733j.pdf|MCP6002]] ICs. For a perfect sine wave one should trim the 500R trim potentimeter to a symetrically wave.\\
  
 {{:​paper_bits:​pb109_vcoii_4016.jpg|}}\\ {{:​paper_bits:​pb109_vcoii_4016.jpg|}}\\
  
 +The oscillation circuit is the same like the [[paper_bits:​pb101_syncvco|PB101 Sync VCO]].\\
 The shaping from a triangle wave to a sine wave is made with a similar circuit like it's described in:    The shaping from a triangle wave to a sine wave is made with a similar circuit like it's described in:   
 [[https://​wiki.analog.com/​university/​courses/​electronics/​electronics-lab-12sg|Lab Activity: Generating sine waves from triangle waves]] by Analog Devices.\\ [[https://​wiki.analog.com/​university/​courses/​electronics/​electronics-lab-12sg|Lab Activity: Generating sine waves from triangle waves]] by Analog Devices.\\
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