In an electronic watch, the component that corresponds to the pendulum of a pendulum clock is a crystal oscillator.

In a pendulum clock, the pendulum swings back and forth to regulate the movement of the clock`s gears and ensure accurate timekeeping. In an electronic watch, which operates on electronic components rather than mechanical mechanisms, a crystal oscillator serves a similar purpose.

A crystal oscillator is a small electronic circuit that utilizes the piezoelectric properties of a crystal, often quartz, to generate a precise and stable frequency. The crystal oscillates at a specific frequency when an electric current is applied to it, serving as a timekeeping element for the watch.

The oscillations of the crystal oscillator provide a stable and accurate time base for the watch`s electronic circuitry, allowing it to accurately measure and display time. The frequency of the crystal oscillator is typically in the range of a few kilohertz (kHz) to several megahertz (MHz), depending on the design of the watch.

Therefore, in an electronic watch, the component corresponding to the pendulum of a pendulum clock is a crystal oscillator.