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Application Notes


CMOS devices have a high input impedance, high gain, and high bandwidth. These characteristics are similar to ideal amplifier characteristics and, hence, a CMOS buffer or inverter can be used in an oscillator circuit in conjunction with other passive components. Now, CMOS oscillator circuits are widely used in high-speed applications because they are economical, easy to use, and take significantly less space than a conventional oscillator. Among the CMOS devices, the unbuffered inverter ('U04) is widely used in oscillator applications. This application report discusses the performance of some TI 'U04 devices in a typical crystal-oscillator circuit.