Class 323/352 - Using an impedance as the final control device

Subclass of Class 323 - Electricity: power supply or regulation systems
Definition: Subject matter wherein the final control device within the
No. of patents: 33
Last issue date: 10/16/2007

Number	Title	Issue Date
7283826	Contactless magnetic sensor for determination of the linear position of a moving body A magnetic sensor for determining the position of a cellular phone in linear movement along an axis of translation, the sensor including a measuring cell fitted to a magnetic circuit and capable of measuring the variations in the value of the magnetic induction flux...	10/16/2007
7245465	Voltage regulator A voltage regulator has an output circuit for producing from an input voltage a predetermined output voltage to be supplied to a load, an overcurrent protection circuit for preventing overcurrent in the output circuit, a memory for storing control information fed fr...	07/17/2007
7208919	Method and apparatus for digitally regulating an output voltage using noise-shaped component selection Provided is a digitally-controlled linear regulator having noise-shaped component selection. The digitally-controlled linear regulator has a regulated-voltage sensor, a comparator module, a quantization module, and an impedance switching network. The regulated-volta...	04/24/2007
7196570	Multiple-time programmable resistance circuit Fuse circuit designs and the use thereof are disclosed. In one example, a fuse circuit providing predictable total resistances for multiple rounds of programming comprises a predetermined number of fuse stages coupled in series. Each stage comprises a first and a se...	03/27/2007
7086111	Electric dental cleaning device The invention is directed to a dental cleaning device. It relates in particular to a handle section of an electric toothbrushing device, with a coupling section for coupling various cleaning tools thereto, a drive mechanism for driving the coupled cleaning tool, and...	08/08/2006
6756774	Constant voltage source, a constant voltage source circuit board and a method for applying a constant voltage A constant voltage source includes a constant voltage supplying circuit including an operational amplifier for supplying an output voltage to a load and a feedback circuit for feeding back the output voltage to the operational amplifier; a first inductance unit disp...	06/29/2004
6608405	Method of obtaining the adjustable capacitor The method of obtaining the adjustable capacitor permits transforming all types of capacitors (including Electrolytic, Vacuum, Gas, high-voltage capacitors) into adjustable capacitors without mechanical parts inside capacitors and provides broad ranges of...	08/19/2003
6459250	Decorative wall plate switch dimmer mechanism A circuit board provides a first elevation adapted for printing and bonding of conductor and resistor traces and monolithic ceramic capacitors, and provides through holes adapted for locating conductors. A second elevation is adapted for location and cont...	10/01/2002
6369550	Method and apparatus for reducing input impedance of a preamplifier A feedback circuit is provided for reducing the input impedance of a preamplifier circuit, such as for use with a sensing coil in an imaging system. The feedback circuit permits adjustment of the input impedance by balancing inductive and capacitive compo...	04/09/2002
6320281	Method of obtaining the adjustable capacitor The method of obtaining the adjustable capacitor permits transforming all types of capacitors (including Electrolytic, Vacuum, Gas, high-voltage capacitors) into adjustable capacitors without mechanical parts inside capacitors and provides broad ranges of...	11/20/2001
6154709	Method for determining the load capacity of an AC network In low-power AC networks, it is desirable when a load is connected, for example an arc furnace or a vehicle, to know the load capacity of the AC network in order to avoid undesirable drops in the network voltage UN. To this end, load voltage si...	11/28/2000
6078110	Method of obtaining the adjustable capacitor The method of obtaining the adjustable capacitor permits transforming all types of capacitors (including Electrolytic, Vacuum, Gas, high-voltage capacitors) into adjustable capacitors without moving parts inside capacitors and provides broad ranges of cha...	06/20/2000
5640082	Duty cycle controlled switch variable capacitor circuit A switch controlled variable capacitor circuit that includes a capacitor having a first terminal and a second terminal; a switch connected across the first and second terminals of the capacitor; a pulse width modulator for controlling the switch to close ...	06/17/1997
5608614	Power converter A power converter has two switched capacitor circuits each including at least a plurality of sets of capacitors and switching elements, first of which circuits is provided for supplying a DC power to a load while second of which accumulates a power in a p...	03/04/1997
5444610	High-power modulator A high-power modulator includes a plurality of means for limiting voltage and a plurality of controllable switches. Each of the switches is connected in parallel with a different one of the voltage limiting means to form a plurality of parallel pairs. Eac...	08/22/1995
5420495	Transmission line power flow controller A transmission line power flow control system and method selectively reverses power flow direction and controls power flow level over a transmission line. A capacitor having a variable capacitive impedance is selectively inserted in series with the line. ...	05/30/1995
5227782	Hydrostatic interface unit An interface unit is provided for transmitting signals to and receiving signals from several transmitters. The interface unit includes a DC power supply, an active load, and a transmit/receive circuit connected to the first wire of a two wire circuit whic...	07/13/1993
5175490	Reference voltage source A reference voltage source which provides a plurality of reference voltages with equal step size between voltages despite loads connected to the reference voltage source. The reference voltage source is composed of a plurality of slave resistors connected...	12/29/1992
4914376	Actuation device for an electrical appliance The invention is directed to an actuation device for an electrical appliance, in particular for small electrical appliances such as tooth-brushes, oral jet devices, hair dryers, curling irons, shavers and food processors, for the open- or closed-loop cont...	04/03/1990
4829229	Series capacitor equipment The reactance of series capacitor equipment connected to an electrical transmission power line can be changed during operation with the aid of a transformer on-load tap-changer which switches in or out a variable number of capacitor modules. The tap-chang...	05/09/1989
4754213	Supply circuit A supply circuit for an apparatus which is provided with a supply voltage which is low relative to the amplitude of a main voltage supplied from a main power supply network. The switching apparatus has a switching line arranged in the main power supply li...	06/28/1988
4719405	High voltage current regulator A high voltage power supply current regulator includes at least one high voltage rectifier diode having a plurality of pn junctions, said diode being adapted to be connected between a high voltage power supply whose current is to be regulated and a load s...	01/12/1988
4634960	Automatic linear compression circuit An automatic linear compression circuit for a telephone "handsfree" loudspeaker is provided. The circuit consists of a variable attenuator the level of attenuation of which is controlled by the input signal level. The input signal is passed through a posi...	01/06/1987
4567375	Soft switch with positive on and off states The specification discloses an electromechanical time delay combination for gradually applying power to the filament of an incandescent lamp. Following actuation to the "on" state, the conduction angle gradually changes from zero to 360°. Following deact...	01/28/1986
4517508	Variable impedance circuit A variable impedance circuit is disclosed which comprises a pair of diodes having their cathodes connected together, a first current source coupled to the connection between the diodes, and a second and a third current source which are connected to the an...	05/14/1985
4513242	Electronic impedance device for providing a variable impedance An electronic impedance device provides a variable impedance in, for example, a Dolby noise reduction system. The device includes an input terminal connected to a source of a signal voltage. A differential voltage-to-current converter circuit, having a re...	04/23/1985
4441072	Multiple input output electrical isolation for use with electronic integrated circuits A plurality of electrical isolation devices are provided on a monolithic integrated circuit. Each of the isolation devices includes a current strap and a magnetic field sensor. The current strap is adapted to carry an electrical current representative of ...	04/03/1984
4398120	Direct current supply particularly for cathode ray tube A direct current supply, making it possible to produce a number of separate regulated voltages from a single regulated supply, constituted by a voltage multiplier with cascade-connected doubler stages. One of the doubler stages, preferably the first, supp...	08/09/1983
4339677	Electrically variable impedance circuit with feedback compensation A variable impedance circuit in which nonlinearities caused by the application of a signal are substantially reduced by the use of a feedback circuit for cancelling out the added input current due to the application of the input signal. By using a feedbac...	07/13/1982
4288707	Electrically variable impedance circuit An electrically variable impedance circuit in which a voltage-current converter circuit is provided to produce a current having a magnitude corresponding to an instantaneous input signal potential applied to an input terminal and a current variation of th...	09/08/1981
4220875	Electronic circuit having its impedance controlled by an external signal This disclosure relates to an electronic circuit which has a controllable impedance. This type of circuit is well suited for application in noise suppression circuits or in signal compression/expansion circuits. The circuit has two stages. The first stage...	09/02/1980
4179650	Variable impedance circuits A variable impedance circuit comprises a differential current circuit having a diode and a first transistor connected so as to operate differentially with respect to each other, and a current control circuit for controlling current flowing through the dif...	12/18/1979
4066914	Electrically variable impedance circuits In a known variable impedance circuit with the variable impedance established across junctions of transistors connected in two branches between a control current source, for variably forward-biasing the junctions, and an equalizing circuit for equalizing ...	01/03/1978

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Class 323/352 - Using an impedance as the final control device