Rabu, 15 Maret 2017
Many electronic devices require a source of en-ergy at a specific frequency which may range from a few Hz to several MHz. This is achieved by an electronic device called an oscillator. Oscillators are extensively used in electronic equipment. For example, in radio and television receivers, oscillators are used to generate high frequency wave (called carrier wave) in the tuning stages. Audio frequency and radio-frequency signals are required for the repair of radio, television and other electronic equipment. Oscillators are also widely used in radar, electronic computers and other electronic devices.
Oscillators can produce sinusoidal or non-sinusoidal (e.g. square wave) waves. In this chapter, we shall confine our attention to sinusoidal oscillators i.e. those which produce sine-wave signals