Abstract:
The present invention pertains to a method of capacitive stimulation of an oscillator control in sensors used for capacitive measurement of strengh, acceleration and especially rotation speed based on the Coriolis principle. In this method, the control is stimulated using high frequency pulse packs, free of continuous voltage and constant in amplitude, of which the width or phase angle relative to the stabilized oscillation speed is adjusted for the purpose of resetting to the initial state or correcting tolerances. Another embodiment of the inventive method allows, in case of electrode oscillators installed in pairs and symmetrically relative to the rotation axis, for high frequency voltages to be obtained that are identical and constant in amplitude. The frequency chosen for these voltages is clearly above the oscillator frequency, resulting in a certain attractive force acting upon the oscillator by shifting the mutual phase lag in the control voltages. In the case of rotation speed sensors the setting of which is based on the closed-loop principle, a resetting to the initial state may also be ensured. The invention also enables problems related to coupling the stimulating signal in the selector channel of a micromechanical oscillator system to be overcome.
Abstract:
A drive for driving a vibration source comprises a sound source (10) for generating tone signals, a DC motor (24) as a vibration source, a low-pass filter (LPF) (16) for extracting low-frequency components from tone signals output from the sound source (10), a detector circuit (18) for detecting the output signal from the low-pass filter (16), a rectifier circuit (20) for rectifying the output from the detector circuit (18), and an amplifier (22) for driving the vibration source based on the low-frequency components extracted by the low-pass filter (16).
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:
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:
The present invention pertains to a method of capacitive stimulation of an oscillator control in sensors used for capacitive measurement of strengh, acceleration and especially rotation speed based on the Coriolis principle. In this method, the control is stimulated using high frequency pulse packs, free of continuous voltage and constant in amplitude, of which the width or phase angle relative to the stabilized oscillation speed is adjusted for the purpose of resetting to the initial state or correcting tolerances. Another embodiment of the inventive method allows, in case of electrode oscillators installed in pairs and symmetrically relative to the rotation axis, for high frequency voltages to be obtained that are identical and constant in amplitude. The frequency chosen for these voltages is clearly above the oscillator frequency, resulting in a certain attractive force acting upon the oscillator by shifting the mutual phase lag in the control voltages. In the case of rotation speed sensors the setting of which is based on the closed-loop principle, a resetting to the initial state may also be ensured. The invention also enables problems related to coupling the stimulating signal in the selector channel of a micromechanical oscillator system to be overcome.
Abstract:
PURPOSE: To provide a bodily sensitive oscillation type annunciator without making user surprised by a bodily sensitive oscillation and capable of increasing the annunciation power. CONSTITUTION: The bodily sensitive oscillation type annunciator is activated over the incoming time of an incoming signal C, and is provided with an oscillation intensity gradually increasing control circuit 2 repeating an operation of ascendingly increasing a drive voltage V to be supplied to an oscillation motor 1 which gradually increases from a minimum oscillation intensity voltage value v1 to a maximum oscillation intensity value v6. This circuit 2 has a resistance voltage dividing circuit 2a which generates each of oscillation intensity voltage values v1 to v6 from the minimum oscillation intensity voltage value v1 to the maximum oscillation intensity voltage value v6 based on a power supply voltage VD and a voltage value ascending change-over circuit 2b which selects each of oscillation intensity voltages v1 to v6 every certain period t in ascending order and outputs them.