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7583154 |
Voltage controlled oscillator
A voltage-controlled oscillator is provided that avoids use of any crystal resonator, or any resonator that is external to and not integrated upon the voltage-controlled oscillator monolithic...
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7528597 |
Induction sensor
Position sensor circuits are disclosed for use with variable reluctance sensors. Variable reluctance sensors are described for linear, angular and rotary position measurement and for acceleration...
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7511585 |
Automatic page detector
The present invention discloses an automatic page detector, to determine which page of a book is open. The automatic page detector uses a sensor plate and an inductor as a sensor. In the invention,...
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7511476 |
Electromagnetic sensor systems and methods of use thereof
Sensor circuits including an oscillator circuit are disclosed. In one instance, the sensing element is a variable reactance element (a variable inductor or/and capacitor).
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7429858 |
Oscillating-beam magnetometer
In one embodiment, an integrated magnetometer has a deformable, electrically conducting beam that is mounted on a substrate and adapted to oscillate with respect to the substrate. When the...
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7418614 |
External signal detection circuit and real-time clock
An external signal detection circuit includes an input port, to which a first end of a circuit including a pull-up resistor connected in series with a first switch portion is connected, the input...
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7398163 |
Sensing apparatus
An object of the present invention is to provide a sensing instrument capable to detect a substance existing in a very small quantity, such as environmental pollutants, instantly with a high degree...
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7348857 |
Monitoring and compensating for real time local circuit speed in an integrated circuit
A circuit and related method of monitoring performance of an integrated circuit is provided comprising: using a variable oscillator that has an oscillation time period that varies within an...
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7332975 |
Reference-less clock circuit
A programmable reference-less oscillator provides a wide range of programmable output frequencies. The programmable reference-less oscillator is implemented on an integrated circuit that includes a...
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7327197 |
Radiation hardened phase locked loop
A method and apparatus for providing a radiation hardened Phase Locked Loop (PLL) are presented. The radiation hardened PLL includes an adjustable bandwidth loop filter. The adjustable filter...
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7271670 |
CR oscillation circuit
A CR oscillation circuit comprises first and second logic elements, a capacitive element, and a resistive element. The first logic element is connected between a first node and a second node. The...
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7242260 |
Real time clock apparatus
A given length of an input signal can be detected with small power consumption. A real time clock apparatus has an oscillating module which outputs an original oscillating clock signal having a...
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7209013 |
Systems and methods for self-calibration
A self-calibrating integrated circuit includes a processor having at least one analog function used with the processor; one or more sensors adapted to sense one or more environmental parameters of...
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7119551 |
Capacitive sensor
An improved two loop capacitive sensor oscillator circuit converts a transducer capacitance to a frequency and includes a first loop to create an oscillatory waveform having a frequency related to...
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7106143 |
Method for achieving highly reproducible acceleration insensitive quartz crystal oscillators
An oscillator and a method for producing an improved oscillator that will generate an accurate frequency when encountering a vibration. The oscillator and method uses a crystal with minimal...
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7098748 |
Integrated CMOS high precision piezo-electrically driven clock
A clock oscillator embedded in an integrated circuit, including a piezoelectric resonator formed on the integrated circuit; a clock generator coupled to the on-chip piezoelectric resonator, one or...
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7053319 |
Electronic weighing apparatus utilizing surface acoustic waves using sensors operating at different frequencies, having temperature compensation, and a push oscillator
A weighing apparatus includes a SAW oscillator and a “push oscillator” to force the SAW oscillator into a desired mode of operation. A SAW temperature oscillator and a thermistor are also...
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7049935 |
Sizing of an electromagnetic transponder system for a dedicated distant coupling operation
A system of contactless electromagnetic transmission between a terminal including a series oscillating circuit for generating an electromagnetic field and a transponder including a parallel...
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7042213 |
Magnetometer having an electromechanical resonator
In one embodiment, a magnetometer includes an electromechanical resonator coupled to a drive-and-detect (DD) circuit. The resonator has a deformable beam that is a part of a closed current path. By...
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7015762 |
Reference timing signal apparatus and method
A reference timing signal apparatus with a phase-locked loop (PLL) has a computer algorithm which adaptively models the multiple frequencies of an oscillator following a training period. The...
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6948388 |
Wireless remote sensor
A sensing system includes a ring oscillator that emits electromagnetic radiation at a characteristic frequency. The ring oscillator comprises an odd number plurality of inverters that are...
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6922111 |
Adaptive frequency clock signal
According to some embodiments, a clock signal having an adaptive frequency is provided.
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6912426 |
Method for determining time constants of a reference model in a cascade controlling circuit
A method for determining at least one time constant of a reference model, which is designed as a 2nd order time-delay element of a machine. The method includes detecting an oscillation frequency of...
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6911873 |
Detection circuit and method for an oscillator
A method and circuit are disclosed for detecting the performance of an oscillator circuit. In particular, the circuit may detect a signal, such as the output of the oscillator circuit, failing to...
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6873215 |
Power down system and method for integrated circuits
A power down system and method for an integrated circuit that enables a power down mode to be maintained for a predetermined time is described herein. The power down system comprises an oscillator,...
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6803859 |
Method and apparatus for active isolation in inductive loop detectors
An oscillator circuit for use with a wire-loop inductive sensor and method for use. The oscillator circuit highly attenuates common-mode noise detected by the wire-loop and differential noise from...
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6711518 |
Method for electronically aligning the frequency of an infrared transmitter
A method is provided for aligning the center frequency of an infrared transmitter. The method comprises the steps of: (a) providing a voltage-controlled oscillator for driving the infrared...
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6611178 |
Nanometer-order mechanical vibrator, production method thereof and measuring device using it
There are provided a stable and highly sensitive nanometric mechanical oscillator having a considerably high detection resolution that enables detection of variation in force or mass on the...
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6600380 |
Method and device for measuring the damping of an LC-oscillating circuit
A known oscillator with a 2-terminal coil without a tapping has only a limited dynamic controllability and apart from this is unsuitable for implementation in CMOS technology. The oscillator, first...
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6583676 |
Proximity/touch detector and calibration circuit
A calibration circuit and method for a proximity/touch detector allow automatic calibration to the proximity/touch detector components, chassis affects, and ambient conditions such that initial...
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6556090 |
Oscillator circuit for a validator
A coin validator tests a coin using a pair of coils coupled in an oscillator circuit which is arranged to drive both the coils concurrently at two separate frequencies without interference...
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6535694 |
Finger actuated device having a proximity detector
The present invention is a button on a device that has the ability to detect when a finger touches or is proximate to the button, especially to cause the initiation of a particular feature/function...
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6512370 |
Low power, frequency-mode magnetometer
A low power, frequency-mode magnetometer. The magnetometer includes an LC oscillator, a bias resistor and a polarity switch. The LC oscillator produces an output signal having a variable frequency...
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6396891 |
Frequency control apparatus and method, and storage medium storing a program for carrying out the method
A frequency control apparatus controls the frequency of an output signal thereof in synchronism with an externally input timing signal. A variable frequency oscillator generates the output signal...
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6384596 |
Variable inductance transducer circuit producing an electrical current and voltage output
This Inductive Displacement Transducer relates to a new and useful set of embodiments for a comparator-type relaxation oscillator circuit where the frequency is controlled by variable inductance....
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6356079 |
Phase-shift type magnetic-field sensor using a magnetic substance
The present invention provides a magnetic-field sensor using a magnetic substance. In the magnetic-field sensor, a transmission-line element constituted of a conductor layer, dielectric layer and a...
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6345228 |
Road vehicle sensing apparatus and signal processing apparatus therefor
A road vehicle sensor provides an output signal having a magnitude which varies with time through a plurality of values as a vehicle passes the sensor. Signal processing apparatus monitors the...
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6337971 |
System for controlling and monitoring agricultural field equipment and method
A pager system for monitoring the operation of a plurality of controllers in each one of a plurality of agricultural field equipment in a group. A plurality of sensors are provided at each location...
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6304083 |
Magnetic field sensor with colossal magneto-resistive material contained within the coil of an oscillator
Sensors, systems and methods for measuring magnetic field strengths in both AC and DC magnetic fields by using CMR material in tunable, radio-frequency LC oscillators are disclosed.
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6278335 |
Oscillator circuit
An oscillator circuit comprising first and second mutually electromagnetically couplable resonant circuits, the second circuit comprising a dielectric element and excitation means operable to...
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6255810 |
Inductive angle sensor having coupled oscillators with similar inductive response
A redundant inductive angle sensor has two LC oscillators of at least approximately identical design. By inductively coupling the oscillators, the oscillators synchronize themselves with respect to...
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6215365 |
Inductive proximity sensor oscillator
An inductive proximity sensor oscillator having a differential comparator in combination with a negative feedback network and a positive feedback network connected to the comparator. The positive...
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6204771 |
Load indicating fastener systems method and apparatus
A fastener system employs a portable, sensing device, such as one or more reactance capacitors or an image processor such as a camera or a laser, which removably attaches adjacent to the fastener...
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6191580 |
Configurable inductive proximity detector to detect ferrous or non-ferrous metal objects
An oscillator 12 outputs a constant frequency as a metal object is brought close and this frequency forces oscillation of an oscillating circuit 11 which is sensitive to this metal object, at a...
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6118344 |
Frequency control apparatus and method and storage medium storing a program for carrying out the method
A frequency control apparatus controls the frequency of an output signal thereof in synchronism with an externally input timing signal. A variable frequency oscillator generates the output signal...
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6031430 |
Temperature stabilized oscillator and proximity switch containing the oscillator
In an oscillator comprising a resonant circuit (L, C, R CU ) and an amplifier circuit (V, R 1 , R 2 , R 3 ) connected as a negative resistance (R n ), a direct current source (I 1 ) is connected in...
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6028492 |
Voltage-controlled oscillator and non-contact IC card including voltage-controlled oscillator
A voltage-controlled oscillator VCO capable of reliably generating an oscillation even if it, after stopping with electric charges remaining on both of its capacitors, is restarted under the same...
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5994907 |
Apparatus for capacitive measurements
The invention relates to an apparatus for measuring the capacitance between at least a conductive part of a wall of a vessel and a measuring electrode situated in the vessel and carrying a...
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5990804 |
Animate body detector
The subject oscillation frequency generating section generates a subject oscillation frequency in response to the capacitance of subject when the subject contacts the measurement electrode. The...
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5973574 |
Oscillator system with corrective frequency modulation
A stabilized frequency oscillating circuit outputs a pixel clock signal to an image scanner for controlling pixel rate at various writing positions along a scan line. The circuit includes a...
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