Exam 21: Oscillators Key

What type modulation exists when both the width and the period of the pulses vary with the modulating signal?

When PWM is used in communications,what is the low-frequency signal such as voice or computer data called that is capacitively coupled to the 555 timer?

The twin-T oscillator is popular because it works well at many frequencies.

An IC function generator cannot perform as which of the following?

A sinusoidal oscillator is basically an amplifier with negative feedback.

An application of the 555 timer sometimes called a voltage-to-frequency converter because the input voltage changes the output frequency is the

Most designers use computers to model high-frequency oscillators.

Above 1 MHz,oscillators use transistors and the frequency of oscillation is determined by LC resonant circuits.

The span of input frequencies over which the VCO of a PLL can remain locked on to the input frequency is called the

The capacitive or link coupling loading effect is kept as high as possible to ensure an undistorted sinusoidal output.