摘要:
A method for temperature compensation of a time basis, driven by a quartz crystal oscillator, comprises a second oscillator having a linear frequency dependency on temperature. The method counts the pulses (65) of the quartz crystal oscillator for at least three different temperatures during time intervals (62, 63..) given by a predetermined number of pulses (61) of the second oscillator. Then the function of variation of the second oscillator period with temperature is calculated based on said three pulse count values. Then said calculated function is used to correct the frequency change of the quartz crystal oscillator due to temperature changes at any operating temperature. Therefore the temperature correction can be provided independently from any offset considerations and is not dependent on the choice of the three different temperatures.
摘要:
A method for temperature compensation of a time basis, driven by a quartz crystal oscillator, comprises a second oscillator having a linear frequency dependency on temperature. The method counts the pulses (65) of the quartz crystal oscillator for at least three different temperatures during time intervals (62, 63..) given by a predetermined number of pulses (61) of the second oscillator. Then the function of variation of the second oscillator period with temperature is calculated based on said three pulse count values. Then said calculated function is used to correct the frequency change of the quartz crystal oscillator due to temperature changes at any operating temperature. Therefore the temperature correction can be provided independently from any offset considerations and is not dependent on the choice of the three different temperatures.
摘要:
Ein Verfahren zur Herstellung eines Halbleiterelementes (40), insbesondere von lichtemittierenden Dioden, setzt ein Kupfersubstrat (10) mit dazwischenliegender Isolationsschicht (50) ein. Dabei wird auf dem Kupfersubstrat (10) vor Aufbringen der Isolationsschicht (50) eine Sinter-Kupferschicht (60) aufgebracht.
摘要:
A device (10) to detect and measure static electric charge (q) on an object (100) being positioned in a distance (r.) from an input electrode (11) of the device (10) comprises at least one MOS field transistor (20). The input electrode (11) is connected with the gate electrode (21) of the MOS-FET (20) to detect said electrical charge. The MOS-FET (20) comprises a gate oxide layer underneath the gate (21) and over the source (22) and drain (23) areas having a sufficient thickness to allow the MOS field transistor (20) to withstand several kilovolts (kV) of voltage and to avoid the loss of charges by tunnel effect due to the high potential of the gate electrode during ESD events.
摘要:
A device for frequency trimming of a crystal oscillator comprising a crystal oscillator, at least one capacitor (C S2 ) to provide the necessary phase shift and an amplifier provided to maintain oscillation. A divider (305) connected with the crystal oscillator driven by the oscillator frequency signal (f OSC ) generates a divided oscillator frequency signal (f OSC /n). A modulator (303) connected with the output of the divider (305) produces a modulated signal (F MOD ) based on said divided oscillator frequency signal (f OSC /n). An additional switchable load capacitor (C MOD ) is capable of being switched in parallel with said at least one capacitor (C S2 ) or in parallel with the crystal oscillator using said modulated signal (F MOD ) to control said switched load capacitor. This device achieves a simple solution for accurate jitter free trimming of a crystal oscillator, which can be readily integrated and used for various frequency control schemes, e.g. temperature compensation.
摘要:
An electronic watch circuit for controlling the operation of a watch having analogue hands comprises an integrated circuit, which contains data values to be transmitted to registers and transmitted to peripheral members of the watch, a quartz crystal providing the clock base frequency to the integrated circuit and a connecting device arranged for enabling the peripheral member controllers, the quartz crystal, and the processor to communicate data relating to the operation of the watch to each other. The electronic circuit further comprises a microcontroller including a processor connected to a programmable memory. The integrated circuit comprises an interface, the microcontroller comprises a further interface, and the microcontroller is connected with the integrated circuit by the interfaces allowing bidirectional exchange of data between the microcontroller and the integrated circuit.
摘要:
A method to provide at least one protective, especially a light-shielding, layer (2) on an integrated circuit (10) applies the protective metal layer (2) as an additional layer to the integrated circuit (10) after completion of the integrated circuit manufacturing step. This allows for an at least partly shielded integrated circuit comprising a protective layer (2,4), wherein the metallic shielding layer (2) and the overlying polyimide layer (4) are patterned with a different, coarser resolution than the other IC metal interconnection layers.