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Modern quartz wristwatch
Modern quartz wristwatch
Circuit board of an e block from a chronograph-wristwatch. Quartz oscillator crystal on right.
Circuit board of an e block from a chronograph-wristwatch. Quartz oscillator crystal on right.
Disassembled analog quartz clockwork; quartz crystal oscillator (top left), Lavet-type stepping motor (left) with a black rotor sprocket and connected
Disassembled analog quartz clockwork; quartz crystal oscillator (top left), Lavet-type stepping motor (left) with a black rotor sprocket and connected white and transparent gears (right). These gears control the movement of the second, minute and hour hands.
Basic quartz wristwatch movement. Bottom right: quartz crystal oscillator, left: button cell watch battery, top right: oscillator counter, digital fre
Basic quartz wristwatch movement. Bottom right: quartz crystal oscillator, left: button cell watch battery, top right: oscillator counter, digital frequency divider and driver for the stepping motor (under black epoxy), top left: the coil of the stepper motor that powers the watch hands.
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Crystal oscillator
Crystal oscillator
A 120 MHz oscillator from 1938 using a parallel rod transmission line resonator (Lecher line). Transmission lines are widely used for UHF oscillators.
A 120 MHz oscillator from 1938 using a parallel rod transmission line resonator (Lecher line). Transmission lines are widely used for UHF oscillators.
Image: Ganna gjenerators M31102 1
Image: Ganna gjenerators M31102 1