U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5508049

Pizza Pie With Concentric Rings of Crust

A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 324/709 - With phase signal processing circuit


Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter including circuit means responsive to the
No. of patents: 64
Last issue date: 09/27/2011


1    
NumberTitleIssue Date
8026731Method and apparatus for constructing images from measurements of impedance
Apparatus and methods are disclosed for obtaining an image of the impedance properties of an object by inferring a measure of straight-line path impedance along a plurality of paths from a plurality of current amplitude and phase measurements made between combinatio...
09/27/2011
7948248Cable length correction
A transmission line impedance compensation method includes the step of providing a measurement device that is adapted to source a test signal having a frequency to a device under test and to determine a corresponding impedance of the device under test using an auto-...
05/24/2011
7436188System and method for improving time domain processed sensor signals
Noise discrimination in signals from a plurality of sensors is conducted by enhancing the phase difference in the signals such that off-axis pick-up is suppressed while on-axis pick-up is enhanced. Alternatively, attenuation/expansion are applied to the signals in a...
10/14/2008
7359177Dual bias frequency plasma reactor with feedback control of E.S.C. voltage using wafer voltage measurement at the bias supply output
A plasma reactor has a dual frequency plasma RF bias power supply furnishing RF bias power comprising first and second frequency components, f(1), f(2), respectively, and an RF power path having an input end coupled to the plasma RF bias power supply a...
04/15/2008
7341644Method for predicting consumption of consumable part, method for predicting deposited-film thickness, and plasma processor
There is not known a conventional method for predicting the consumed degree of consumable supplies and the thickness of deposited films without opening a processing chamber. A method for predicting the consumed degree of a consumable supply and the thickness ...
03/11/2008
7340357Arbitrary waveform generator with configurable digital signal processing unit
An arbitrary waveform generator including a digital signal procession unit and a memory. The digital signal processing unit may be configurable to interconnect a plurality of processing components in different configurations to process data received from the memory ...
03/04/2008
7282929Apparatus for current sensing
Apparatus for sensing a current across a known resistor comprising a switched capacitor network and an amplifier having an input coupled to an output of the switched capacitor network. The switched capacitor network is configured to sample first and second reference...
10/16/2007
7247218Plasma density, energy and etch rate measurements at bias power input and real time feedback control of plasma source and bias power
A plasma reactor process measurement instrument includes an input phase processor receiving wafer bias voltage, current and power and computing an input impedance, an input current and an input voltage to the transmission line; a transmission line processor for comp...
07/24/2007
7220937Plasma reactor with overhead RF source power electrode with low loss, low arcing tendency and low contamination
A gas distribution ceiling electrode for use as a capacitive source power applicator and gas distribution showerhead in a plasma reactor includes a metal base and a process-compatible protective layer on the interior surface of he electrode having a dopant impurity ...
05/22/2007
7201823High throughput plasma treatment system
A method for the plasma treatment of parts. The method includes sending loading signals from an electronic control to a transfer mechanism and loading the parts from a position outside of the treatment chamber to a plurality of treatment positions within the treatme...
04/10/2007
7196283Plasma reactor overhead source power electrode with low arcing tendency, cylindrical gas outlets and shaped surface
An overhead gas distribution electrode forming at least a portion of the ceiling of a plasma reactor has a bottom surface facing a processing zone of the reactor. The electrode includes a gas supply manifold for receiving process gas at a supply pressure at a top po...
03/27/2007
7186943MERIE plasma reactor with overhead RF electrode tuned to the plasma with arcing suppression
A plasma reactor for processing a semiconductor workpiece, includes a reactor chamber having a chamber wall and containing a workpiece support for holding the semiconductor support, the electrode comprising a portion of the chamber wall, an RF power generator for su...
03/06/2007
7176634Coaxial type impedance matching device and impedance detecting method for plasma generation
A plasma generating method generates plasma in a treating chamber by controlling a high-frequency generating unit to generate a high-frequency signal and by feeding the high-frequency signal to the treating chamber through an impedance matching device. The plasma ge...
02/13/2007
7148694Contact impedance test circuit and method
A contact impedance test circuit for testing impedance between a first contact element and a second contact element comprising an AC signal source for applying an AC signal voltage to the first contact element, an AC contact voltage being emitted by the second conta...
12/12/2006
7141757Plasma reactor with overhead RF source power electrode having a resonance that is virtually pressure independent
A plasma reactor operable over a very wide process window of pressure, source power and bias power includes a resonant circuit consisting of an overhead electrode having a first impedance, a wafer support pedestal having a second impedance and a bulk plasma having a...
11/28/2006
7130767Computer-implemented data presentation techniques for a plasma processing system
A computer-implemented data presentation technique for presenting a set of expected failure states of system-related constructs pertaining to a plasma processing system is disclosed. The technique includes receiving a set of indicia pertaining to a first system-rela...
10/31/2006
7122965Methods and apparatus for calibration and metrology for an integrated RF generator system
The invention features RF plasma generation systems, methods for operating the systems, methods for calibrating the systems, and calibration apparatus. One RF plasma generation system includes an impedance matching network having an input port to receive an RF signa...
10/17/2006
7102365Apparatus for current sensing
Apparatus for sensing a current across a known resistor including a switched capacitor network and an amplifier having an input coupled to an output of the switched capacitor network. The switched capacitor network is configured to sample first and second reference ...
09/05/2006
7071816Audible alert device and method for the manufacture and programming of the same
An audible alert device includes a pulse width modulated signal generator. The audible alert device and method for manufacturing the audible alert device also provides resonant frequency and decibel peaking capabilities. Resonant frequency and decibel peaking routin...
07/04/2006
7030335Plasma reactor with overhead RF electrode tuned to the plasma with arcing suppression
A plasma reactor for processing a semiconductor workpiece, includes a reactor chamber having a chamber wall and containing a workpiece support for holding the semiconductor workpiece, an overhead electrode overlying said workpiece support, the electrode comprising a...
04/18/2006
7019542Method and apparatus for battery testing
A method for testing electrochemical cells applies to a portion of a cycle of a low-frequency excitation waveform to a cell under test while maintaining an amplitude of the excitation waveform below a threshold value. In some cases a quarter cycle of the excitation ...
03/28/2006
7004107Method and apparatus for monitoring and adjusting chamber impedance
A substrate processing system that includes a deposition chamber having a reaction zone, a substrate holder that positions a substrate in the reaction zone, a gas distribution system that includes a gas inlet manifold for supplying one or more process gases to said ...
02/28/2006
6972071High-speed symmetrical plasma treatment system
A plasma treatment system (10) and related methods for rapidly treating a workpiece (56) with ions from a plasma having an ion density that is reproducibly uniform and symmetrical. The processing chamber (12) of the plasma treatment system (1...
12/06/2005
6970700Power delivery system
A method and apparatus for measuring the characteristics of radio frequency energy in an industrial radio frequency processing system at a plurality of frequencies is disclosed. The method and apparatus measures the characteristics of radio energy using one detector...
11/29/2005
6867603Method for measuring high frequency resistance in diesel engine lubrication oil
Soot content in Diesel engine lubrication oil is determined using electrical resistance measurements of the oil at high frequency. A sensor in the form of a capacitor is immersed in the oil, wherein the oil serves as a dielectric between the plates. The capacitance ...
03/15/2005
6760633Method and apparatus for predicting stability of a closed loop apparatus
A method for predicting stability of a closed loop apparatus is disclosed. The closed loop apparatus has an open loop impedance and at least one inherent internal gain. The method comprises the steps of: (a) identifying an impedance scaling factor associated with th...
07/06/2004
6639414Circuit for measuring changes in capacitor gap using a switched capacitor technique
Disclosed is a single-stage, switched capacitor circuit for measuring changes in a variable by measuring changes in a capacitor gap. The change in the capacitor gap corresponds directly to a change in a measurable variable, such as pressure and accelerati...
10/28/2003
6333634Method for measuring radio-frequency current
A radio-frequency power supply (1) and a matching box (2) are electrically connected with a coaxial cable (4) while the matching box (2) and a main unit (3) are electrically connected with a coaxial cable (5). Around the coaxial cable (5), a radio-frequen...
12/25/2001
6328934Device for detection of when a test probe gets into contact with a liquid surface
A device for detection of when at test probe of conducting material contacts a liquid surface includes a test probe of conducting material. The test probe is electrically screened by an insulated screen, with a part of the test probe projecting in front o...
12/11/2001
6278282Method and system for determining oil quality
A method for determining quality of lubricating oil using electrodes in contact with the oil includes applying a potential having a first amplitude to the electrodes, wherein the first amplitude is sufficiently low such that substantially no solution curr...
08/21/2001
6054867Method for stabilizing feedback loop of impedance measuring apparatus
A method for stabilizing feedback loop in impedance measuring equipment involves determining a null loop transfer function of the impedance measuring device by utilizing multiple independent, known impedances. The phase characteristics of the null loop is...
04/25/2000
6037784Resistivity measuring apparatus having transmitter and receiver with power level signals
Material resistivity measuring apparatus includes a transmitter for transmitting a measurement frequency current through the material to a receiver spaced from the transmitter. The transmitter includes a power amplifier wherein the measurement frequency c...
03/14/2000
5746905Coating evaluation system
The organic coating deposited on a metallic substrate is quantitatively euated by measurement of electrical signals through an electrochemical cell having an electrode separated from the deposited coating by a porous pad within which a liquid medium is a...
05/05/1998
5668480Variable-phase resistive transducer, and method of operating same
A transducer (23) for producing a digital output signal proportional to a change in a sensed physical parameter includes first and second pairs of series-connected resistors (24, 25 or 26, 28). The electrical resistance of at least one of these resistors ...
09/16/1997
5612621Method for monitoring cracks and critical concentration by using phase angle
A method for monitoring cracks in a sample of materials by applying the theory that the phase angle increases in the sample of materials being tested where cracks have formed. The method is performed by preparing a solution capable of forming cracks in th...
03/18/1997
5576629Plasma monitoring and control method and system
A plasma monitoring and control method and system monitor and control plasma in an electronic device fabrication reactor by sensing the voltage of the radio frequency power that is directed into the plasma producing gas at the input to the plasma producin...
11/19/1996
5537043Method for monitoring cracks and critical concentration by using phase angle
A method for monitoring cracks in a sample of materials by applying the theory that the phase angle increases in the sample of materials being tested where cracks have formed. The method is performed by preparing a solution capable of forming cracks in th...
07/16/1996
5442297Contactless sheet resistance measurement method and apparatus
A contactless sheet resistance measurement apparatus and a method for measuring the sheet resistance of a desired layer of a first conductivity type, formed upon a substrate of an opposite conductivity type, is disclosed. The apparatus comprises a junctio...
08/15/1995
5329238Arrangement for fault monitoring an electric consumer in a motor vehicle to detect short circuits and interruptions in the region of the consumer
The invention is directed to an arrangement for monitoring an electric consumer in a motor vehicle. The consumer can be actuated by at least one pulse-shaped control signal formed by a control unit with this actuation taking place via a switching device. ...
07/12/1994
5294891Method and apparatus for determining the quality of a colloidal suspension
A method and apparatus for determining the quality of a colloidal suspension. According to the method of the present invention, an oscillating input electrical signal is applied simultaneously to a sample of the colloidal suspension to be tested and to a ...
03/15/1994
1    
 
Sign InRegister
Username  
Password   
forgot password?