Switched-capacitor filters eliminate the need for precision components, but require a clock from a microcontroller to set the center frequency. With the limited number of outputs and timers on popular low-cost...

# John R. Ambrose

### Vice President of Engineering and System Engineering, Mixed Signal Integration Corp.

*John R. Amrbose **is the vice president of applications and system engineering at Mixed Signal Integration Corp. He can be reached at [email protected] *

#### John’s Recent activity

Direct digital synthesis ICs can convert square waves to sine/cosine waves but their complexity is a disadvantage. This circuit uses simple CMOS logic and two switched-capacitor filters to perform the conversion.

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Sep 13, 2006

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Apr 12, 2006

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