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Recent content by D101

Voltage controlled resistor or low pass

Hi Laffalot Thank you for your help so far Really I need a voltage controlled resistor not digital the value not that important as long as it can ghange perhaps 10 to 1. As for the voltage controlled low pass filter the frequency's Im interested in are between 20K to 100K I have heard that you...
- D101
- Post #3
- Oct 25, 2001
- Forum: Electrical Engineering general discussion
Voltage controlled resistor or low pass

Hi Can any one help I want to make a voltage controlled resistor or a voltage controlled low pass filter. Many Thanks
- D101
- Thread
- Oct 25, 2001
- Replies: 8
- Forum: Electrical Engineering general discussion
Phase Detection

Hi I have a 5v sine wave the frequency can be varied between 20kHz and 130kHz I need to detect zero crossing and 90 degree's Can anyone help Many thanks David
- D101
- Thread
- Oct 15, 2001
- Replies: 3
- Forum: Electrical Engineering general discussion

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