CMOS logic devices have been used for many years as oscillators. Many designers have shied away from trying to design their own oscillator for fear issues that are hard to foresee. One issue is determining whether an oscillator will“start-up”. Another issue is the size of the logic circuit.Whereas in the past, a package of 4 or 6 gates or inverters in a small SOIC package was considered very small, today’s wireless/handheld products require a much smaller footprint or board area than a 14 pin package.
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