A small rectangle between two plates, marking a quartz frequency reference.
Also known as: Quartz crystal symbol, XTAL, Rectangle between two lines
A rectangle between two capacitor plates marks a quartz crystal. The drawing is literal: the rectangle is the crystal and the plates are the electrodes clamping it.
Represents a piezoelectric crystal used as a precise frequency reference in an oscillator circuit.
Contexts: Technical drawing, Electrical equipment
Draws the component literally: the rectangle is the crystal wafer and the two parallel plates either side are the electrodes.
Contexts: Technical drawing, Electrical equipment
A small rectangle centred between two short parallel lines set perpendicular to the circuit path, each line connected to a terminal.
The two parallel plates are drawn exactly as a capacitor's are.