Abstract: The receiver (1) is for receiving radio-synchronous signals for adjusting the time base of a timepiece. The receiver includes an antenna (2) for receiving radio-synchronous signals, a low noise amplifier (3), connected to the antenna, a frequency conversion unit (7) for converting the frequency of the filtered and amplified incoming signals from the amplifier, and a processing unit (8) receiving data signals (data_out) from the conversion unit for adjusting the time base. The conversion unit includes a local oscillator stage (10) with a quartz (12) for supplying oscillating signals (Sm) at a determined frequency, a mixer unit (4) for mixing the incoming signals with the oscillating signals from the oscillator stage to generate intermediate signals (IF), a bandpass filter (5) for filtering the intermediate signals (IF), and a demodulator (6) receiving the filtered intermediate signals and supplying the data signals.

Abstract: Systems and methods for calibrating real time clock are provided. A representative receiver includes a GPS device comprising a real time clock (RTC) circuitry that generates RTC clock signals and a temperature compensated crystal oscillator (TCXO) that generates TCXO clock signals. A ratio counter circuitry receives both the RTC clock signals and the TCXO clock signals and determines a frequency ratio by comparing the RTC clock signals and the TCXO clock signals. A computing device receives the frequency ratio and estimates a current RTC frequency based on the received frequency ratio. The computing device is configured to calibrate an estimated RTC time being maintained at the RTC circuitry based on an estimated RTC frequency from a prior estimation, the current RTC frequency and an elapsed time of the RTC circuitry.

Abstract: An electronic timer system includes a counter-based time generator for continuously generating raw base time, and a translator for translating between raw base time and local precise time. The counter-based time generator is driven by an oscillator. The timer system further includes a temperature sensor placed in the proximity of the oscillator or a crystal used by the oscillator, and a look-up control table holding temperature values associated with corresponding control values representative of the configurable parameter value A. The look-up control table is generated when the timer system is synchronized with a synchronization source so that the temperature and control values are characteristic of the operation of the timer system in synchronization.

Abstract: According to one aspect, the invention provides a method of synchronizing a clock included in a device. According to one embodiment, the method includes acts of: (a) receiving with the device a clock signal including a time standard provided by a reference clock; (b) determining an elapsed time since a prior receipt of a clock signal including a time standard provided by the reference clock; (c) determining an error between a time provided by the clock signal received in act (a) and a time maintained by the clock included in the device; and (d) adjusting the time maintained by the clock included in the device to correct for the error determined by act (c), where the reference clock comprises an atomic clock.

Abstract: A high accuracy atomic frequency standard and clock which utilizes a micrmputer. The microcomputer compensates for aging and temperature variations in the atomic standard and its slave crystal oscillator and generates an error signal which is used to either correct the frequency of the slave crystal oscillator or to adjust the number of clock pulses per unit time interval. No C-field adjustment is employed.