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Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks. Generally, some form of digital logic ...
A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. [1] [2] [3] The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers.
Radio clock. A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.
Real-time clock, quartz watches and clocks; common low-speed for microcontrollers. Very common. Available as TCXO. [1] 0.038000 Used with FM stereo encoder chip BA1404 and similar. 0.065536 2 16 allows binary division to 1 Hz and 32.768 kHz. Real-time clock. 0.077500 Real-time clock, quartz watches and clocks; also the DCF77 frequency 0.100000
Crystal oscillators are the most common type of linear oscillator, used to stabilize the frequency of most radio transmitters, and to generate the clock signal in computers and quartz clocks. Crystal oscillators often use the same circuits as LC oscillators, with the crystal replacing the tuned circuit ; [ 2 ] the Pierce oscillator circuit is ...
Most RTCs use a crystal oscillator, [7] [8] but some have the option of using the power line frequency. [9] The crystal frequency is usually 32.768 kHz, [7] the same frequency used in quartz clocks and watches. Being exactly 2 15 cycles per second, it is a convenient rate to use with simple binary counter circuits.
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