Abstract:
A system (204, 234, 236, 116, 616) and method (400, 500) for driving a vibrator (112) in an electronic device (102), as well as electronic device employing such a system or method, are disclosed. In one example embodiment, the system (204, 234, 236, 116, 616) for driving the vibrator (112) includes an integrated circuit (116, 616) having one or more input terminals (303, 304, 305, 306), one or more output terminals (336, 337), a vibrator driver amplifier circuit (330), and one or more additional circuit components (308, 310, 610). The system further includes at least one processing portion (234, 236) for providing one or more input signals (702, 801, 802, 902, 1002) to the one or more of the input terminals (303, 304, 305, 306). The system (204, 234, 236, 116, 616) is configurable such that one or more control signals (704, 810, 904, 1004) to be provided to the vibrator (112) will include one or more first signals (704, 810) if the vibrator (112) is a first vibrator device of a first type (114), and one or more second signals (904, 1004) if the vibrator is a second vibrator device of a second type (115) different from the first type.
Abstract:
An adaptive intelligent electronic horn (100) comprises a mechanical soniferous apparatus (112), an electromagnetic coil (106), a driver circuit (104) and an oscillating circuit (102). A sensor (110) is provided between the mechanical soniferous apparatus (112) and the oscillating circuit (102). An on-off ratio adjusting circuit (108) is provided at the input end of the oscillating circuit (102). The sensor (110) is used to measure the oscillation frequency of the mechanical soniferous apparatus (112) and feedback the measured oscillation frequency signal to the oscillating circuit (102). The on-off ratio adjusting circuit (108) is used to control a pulse width of an oscillation signal from the oscillating circuit (102) based on a voltage of power supply and/or an ambient temperature. The oscillating circuit (102) is used to output corresponding oscillation signal to the driver circuit (104) based on the oscillation frequency signal received from the sensor (110) and/or the control signal from the on-off ratio adjusting circuit (108).
Abstract:
Das Signalhorn, bei dem sich äussere Einflüsse möglichst wenig auf das Betriebsverhalten auswirken, besitzt einen Regelkreis zum adaptiven Abstimmen einer Betriebsgrösse auf einen vorgebbaren Sollwert. Dabei steuert ein von einem Pulsgenerator (6) gesteuerter Schalter (5) einen durch das Signalhorn (1) fliessenden Erregerstrom (I) bezüglich seiner Pulsfrequenz und/oder seines Puls-Tastverhältnisses. Es sind Schaltungsmittel (11) vorhanden, welche ein oder mehrere charakteristische Grössen des Erregerstroms (I) erfassen, und es sind weitere Schaltungsmittel (12) vorhanden, welche aus der Abweichung zwischen der (dem) aus dem Erregerstrom (I) abgeleiteten charakteristischen Grösse(n) und ein oder mehreren Sollwerten ein oder mehrere Stellgrössen für den Pulsgenerator (6) bereitstellen.
Abstract:
A relatively high voltage is developed across a buzzer (11) by placing a resistance in the discharge path of a buzzer, e.g., by shunting one or more Zener diodes or LEDs (14) across a switching transistor (12), the switching transistor being connected in series with the buzzer between a voltage potential and ground. Alternatively, the buzzer is shunted with a resistive element, with or without series connected reversed biased diode. The result is a higher audio output without a corresponding increase in power consumption.
Abstract:
An alerting device which has an alerting unit (2) with a built-in vibrator resonated when receiving a driving signal and a signal generating circuit (5) which supplies a driving signal to the alerting unit (2). The signal generating circuit (5) generates the driving signal Dv whose frequency varies within a certain frequency range containing the resonance frequency of the vibrator and supplies the driving signal Dv to the alerting unit (2). The variation width of the frequency of the driving signal is predetermined in accordance with the variation width of the resonance frequency which is caused by the tolerances of the factors determining the resonance frequency. Further, the driving signal has an alternating rectangular or sinusoidal waveform and its frequency varies within a range of 1.37 - 2.98 Hz periodically. By the alerting device, a sufficient alerting effect can be obtained regardless of the variation of the resonance frequency of the vibrator.
Abstract:
With a known method of operating an electromagnetic oscillator, the drive frequency is outside the mains frequency. It is now possible to determine the drive frequency fA on the basis of the time interval between two optional half-waves (1, 2, 3...16) in a multiphase system with at least two phases (p) and periodically to apply the half-waves of the threephase current selected for this drive frequency to the drive. The drive frequency fA is given by formula (I) wherein fN is the mains frequency, n is the number of positive and negative half-waves following the first selected half-wave (1) including the final half-wave (12) of the time interval.