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7292019 |
Method for accurately setting parameters inside integrated circuits using inaccurate external components
The control precision of one or more parameters of an integrated circuit (IC), for example the output voltage of a voltage regulator comprised in the IC, may be improved even when using inaccurate...
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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...
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7071669 |
Reference voltage generation circuit, display driver circuit, display device, and method of generating reference voltage
A reference voltage generation circuit includes first to third resistance ladder circuits. The first resistance ladder circuit has at least one variable resistance circuit in which a resistance...
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6922046 |
Variable impedance network with coarse and fine controls
An impedance network. The network includes a plurality of impedance elements, at least one end terminal, and a wiper terminal. The network also includes a first plurality of switching elements...
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6882136 |
Variable impedance network for an integrated circuit potentiometer
An impedance network, which includes at least one end terminal, a wiper terminal, a center impedance element, and a first plurality of impedance elements. The wiper terminal provides a tap position...
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6697060 |
Liquid-crystal display, electronic device, and power supply circuit for driving liquid-crystal display
A power supply circuit for generating potentials used to drive a liquid crystal, has first to fourth switches ( 101 to 104 ) connected in series between a high potential line ( 105 ) and a low...
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6690149 |
Power supply and display apparatus including thereof
A power supply in accordance with the present invention includes: a resistance voltage-dividing circuit for generating an intermediate voltage, to which a targeted voltage value is allocated, from...
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6603280 |
Motor controller
A converter module which receives an AC voltage, converts the AC voltage to a DC voltage, and outputs the DC voltage to a circuit for driving a motor. The converter module includes a switching...
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6556000 |
Fast edge generator with wide dynamic range
The electronic calibration equipment for verifying the high frequency characteristics of electronic test equipment, including oscilloscopes arid time interval analyzers is provided. An electronic...
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6555996 |
High-resolution, high-precision solid-state potentiometer
Disclosed are solid-state potentiometers having high resolution and high accuracy. An exemplary potentiometer comprises a first main terminal, a second main terminal, a wiper terminal, and a...
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6489759 |
Standby voltage controller and voltage divider in a configuration for supplying voltages to an electronic circuit
The voltage supply provides voltages to an electronic circuit requiring at least two different supply voltages. A plurality of standby supply voltages with different levels are obtained from the...
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6455952 |
Adjustment circuit for voltage division
An adjustable circuit for voltage division comprises a serial resistor R n (n=1, 2 . . . n) symmetrically mapped, connected in series, and paired in parallel with a switch S n or S n ′ apiece,...
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5883506 |
Power supply with voltage stabilizing control circuit
An arbitrary input AC voltage is applied from an external power supply (1) to a rectifying circuit (2), and one rectifying output end of the rectifying circuit is connected to a switching element...
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5818210 |
Reference voltage generating circuit
A reference voltage generating circuit outputs a reference voltage (used for comparison of magnitude with an analog voltage) at a plurality of levels by using a differential amplifier to amplify...
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5717323 |
Resistance reference circuit
The present invention describes a resistance reference circuit that includes a reference resistor that is substantially independent of temperature variations to which the resistance reference...
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5321349 |
Rechargeable/portable multi-voltage dc power supply
A rechargeable/portable multi-voltage DC power supply includes an Ni-Cd rechargeable battery set connected to a switching power supply converting circuit, a pulse width modulation circuit, and a...
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5281908 |
Loading device assembly
A transportable loading device assembly includes a low-voltage small-capacity variable loading device having a load change-over element which enables the load to be applied to be incrementally...
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5216355 |
Electronic volume controller
A main ladder attenuator has a series of resistors and switches for connecting corresponding resistors to an output. The controller has an auxiliary ladder attenuator connected to the main ladder...
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5164653 |
Battery discharge control system
Apparatus for controlling rate of battery current discharge, comprising, variable means applying resistance load to the battery output, comparator means connected for defining and communicating a...
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4853612 |
RF power control circuit
An RF power control circuit for dividing a DC voltage by a plurality of resistors, selecting one of the partial voltages, and using the selected voltage as a reference voltage, thereby obtaining a...
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4816741 |
Switched resistor regulator with diode-snubber for parasitic inductance in switched resistor
There is disclosed a diode snubber for the voltage transients generated in the parasitic inductance of a switched resistor when current therethrough is interrupted. Also disclosed is the use of...
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4814966 |
Shunt switched resistor regulator with diode snubber
There is disclosed a diode snubber for the voltage transients generated in the parasitic inductance of a switched resistor when current therethrough is interrupted. Also disclosed is the use of...
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4810948 |
Constant-voltage regulated power supply circuit
A constant-voltage regulated power supply circuit has an input circuit and an output circuit. The sense circuit includes a programmable sense circuit that further includes a divider network with a...
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4719404 |
Switched resistor regulator with linear dissipative regulator
A switched resistor regulator controls current flow through a resistor electrically connected to a load by varying the duty cycle of switching the resistor into electrical connection between of a...
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4668906 |
Switched resistor regulator
A switched resistor regulator controls current flow through a resistor electrically connected to a load by varying the duty cycle of switching the resistor into electrical connection between of a...
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4665458 |
Acceleration power supply
An acceleration power supply includes a series-connected semiconductor switches with voltage dividing elements and another semiconductor switch coupled in series to the series-connected...
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4549074 |
Temperature controller for providing a rapid initial heating cycle using a variable reference voltage
A temperature controller applied to flat heating equipment, such as an electric blanket, is disclosed wherein power supply control to a heater wire in the blanket is performed, using a...
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4349777 |
Variable current source
A plurality of metal resistance elements and a metal resistance element for compensation use are formed on a common substrate and placed under the same temperature condition. A reference current is...
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4276604 |
Automatic attenuation circuit
An automatic attenuation circuit comprises a variable loss attenuation circuit that drives circuitry for detecting the level of the output signal of the variable loss attenuation circuit. The level...
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4100586 |
Tungsten lamp circuit for current limiting and fault indication
A current limiting and fault indicating circuit for connection between a load and a source of electrical current including a pair of tungsten lamp filaments connected in parallel. The lamp...
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3912978 |
Power circuit including current limiting device for an electric vehicle
A current limiting device for the power circuit of an electric vehicle is provided. The device consists of a shunt wire of known resistance and a coil of a low power relay, connected in parallel...
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3731181 |
IMPROVED REFERENCE CURRENT SOURCE
A digital to analog converter is supplied with operating current from a reference current source including an operational amplifier, across the input terminals of which are connected a reference...
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3707670 |
VARIABLE LOW RESISTANCE CIRCUIT WITH SUPERCONDUCTING SHUNTS
Low resistance circuit, for use in series with superconducting component, having resistance value changeable between a low resistance and that of a superconductor below its critical temperature T c...
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3569821 |
PROGRAMMABLE DIGITAL TO ANALOGUE CONVERTER SYSTEM
Automatic test equipment requires highly accurate test signals. The maintenance of a substantially constant input, accurately defined within precise limits, insures such a test signal. A digital...
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3546573 |
VOLTAGE RANGE LIMITING CIRCUITRY MEANS
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3388306 |
Control circuit for direct current motors including semiconductor cell means connected across starting resistors
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3281832 |
Digital to analog conversion apparatus
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3138754 |
Printed circuit formula card systems and their components
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3089082 |
Switching circuits
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3083332 |
Voltage regulating system
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3051890 |
Voltage regulator circuit
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2917700 |
Current supply apparatus
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2787756 |
Electric control means
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2780769 |
System of regulation
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1006631 |
Title is not available
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RE12538 |
Title is not available
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3566252 |
Title is not available
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