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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 8164321 | Current injector circuit for supplying a load transient in an integrated circuit A current injector circuit comprises a clock modulating circuit, a first current injector, a feedback circuit, a first input modulating circuit and a second current injector. The clock modulating circuit receives a clock, a control signal, and an output. The first c... | 04/24/2012 |
| 7952342 | Constant current source apparatus A constant current source apparatus is provided that includes a complementary switching section that selectively outputs a reference voltage or a driving voltage according to a control signal and a constant current source circuit that causes a constant current deter... | 05/31/2011 |
| 7868604 | Fast voltage regulators for charge pumps A digital multilevel memory system includes a charge pump and a voltage regulator for generating regulated high voltages for various memory operations. The charge pump may include a plurality of boost circuits to boost the output of the charge pump during a fast sta... | 01/11/2011 |
| 7834611 | Bandgap reference generating circuit A bandgap reference generating circuit includes an operational amplifier configured to generate a bandgap reference voltage; and a gain controller configured to control a gain of the operational amplifier with different values in a normal mode and a low power mode. | 11/16/2010 |
| 7633281 | Reference current circuit for adjusting its output current at a low power-supply voltage A reference current circuit includes a differential amplifier amplifying a difference in potential between a reference voltage and a first node and outputting the amplified potential difference to a second node, and adjusting transistors connected between a supply v... | 12/15/2009 |
| 7531999 | Startup circuit and startup method for bandgap voltage generator A startup circuit for activating a bandgap circuit is provided, including a switching circuit, an activating circuit, and a controlling circuit. The controlling circuit is used for monitoring and comparing two voltages to determine whether the switching circuit shou... | 05/12/2009 |
| 7479775 | Negative voltage generator A negative voltage generator includes a current mirror unit, a control unit, a resistor, and a switching unit. The current mirror unit receives a first positive voltage from a first positive voltage source and a second positive voltage from a second positive voltage... | 01/20/2009 |
| 7417416 | Regulator with load tracking bias An electrical circuit that provides accurate, regulated output voltage over a wide range of input voltages, while exhibiting each of three desired characteristics: accuracy across different supply/process/temperature; stability and linearity yielding phase/gain marg... | 08/26/2008 |
| 7327203 | PWM signal generation circuit and PWM control circuit A PWM signal generation circuit and a PWM control circuit are provided in which the duty ratio is easily changed and which can also avoid adverse impact from ambient temperature changes and the like. At the beginning of charging a capacitor with a current flow, a vo... | 02/05/2008 |
| 7319314 | Replica regulator with continuous output correction Circuits for regulating a voltage or current to a load(s). In one example, a circuit may include a first amplifier providing an amplifier output signal, the first amplifier having at least a first input and a second input, the first input receiving a voltage referen... | 01/15/2008 |
| 7280376 | Primary side voltage sense for AC/DC power supplies capable of compensation for a voltage drop in the secondary In a method and system for providing isolated power, a flyback controller includes a transformer operable to receive a primary voltage input and generate a secondary voltage output. A switch electrically coupled in series with a primary side of the transformer recei... | 10/09/2007 |
| 7272023 | High efficiency power converter A power converter nearly losslessly delivers energy and recovers energy from capacitors associated with controlled rectifiers in a secondary winding circuit, each controlled rectifier having a parallel uncontrolled rectifier. First and second primary switches in ser... | 09/18/2007 |
| 7259614 | Voltage sensing circuit An auto voltage sense circuit uses voltage controlled current sources to generate a desired reference voltage level that closely tracks the variations and changes of a first voltage level and a second voltage level. The auto voltage sensing circuit includes a first ... | 08/21/2007 |
| 7248100 | Semiconductor device including current mirror circuit A semiconductor device including a plurality of current mirror circuits is disclosed. The current mirror circuits having reference input terminals and output terminals respectively. Each of the reference input terminals is provided with a current having a different ... | 07/24/2007 |
| 7242172 | Microprocessor die with integrated voltage regulation control circuit An integrated circuit die includes a microprocessor and a control circuit to control elements of a voltage regulator to supply power to the microprocessor. ... | 07/10/2007 |
| 7239184 | Low power and high efficiency voltage-to-current converter with improved power supply rejection A low power and high efficiency voltage-to-current (V/I) converter designed with few parts and having improved power supply rejection. The V/I converter may include an op-amp, a MOSFET, and a first and second voltage dividers. The first voltage divider circuit may i... | 07/03/2007 |
| 7224156 | Voltage regulator for use in portable applications A voltage regulator includes a first stage capable having a first current flowing through it. A second stage has a second current. A third stage is capable of outputting an output voltage and has a third current flowing through it. The first, second and third curren... | 05/29/2007 |
| 7224209 | Speed-up circuit for initiation of proportional to absolute temperature biasing circuits A PTAT biasing circuit for use in a bandgap referenced voltage source includes a startup sub-circuit. Prior to activation of a power up indication signal, the speedup circuit forces the PTAT biasing circuit from a degenerate operating point to a normal operating poi... | 05/29/2007 |
| 7164260 | Bandgap reference circuit with a shared resistive network A CMOS bandgap reference (BGR) voltage generator circuit has a passive resistor T-network of low resistance connected between the inverting and non-inverting inputs of the op-amp in the circuit. The op-amp's output is connected to the gates of three PMOS transistors... | 01/16/2007 |
| 7161412 | Analog calibration of a current source array at low supply voltages A calibration circuit for a current source cell includes a reference current source and a transresistance amplifier forming a feedback loop for calibrating the output current of the current source cell. The reference current source supplies a reference current to a ... | 01/09/2007 |
| 7151656 | Arc fault circuit interrupter system A system for determining whether arcing is present in an electrical circuit in response to a sensor signal corresponding to current in the circuit includes a circuit for analyzing the sensor signal to determine the presence of broadband noise in a predetermined rang... | 12/19/2006 |
| 7138778 | Current sensor using mirror MOSFET and PWM inverter incorporating the same A current sensor has a power MOSFET Q1, connected between an electric load and a power supply, for controlling current that flows through said electric load, a mirror MOSFET Q2, connected in parallel to said power MOSFET Q1, in which a portion o... | 11/21/2006 |
| 7136265 | Load recognition and series arc detection using bandpass filter signatures A method and system for determining whether arcing is present in an electrical circuit includes sensing a change in an alternating current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband n... | 11/14/2006 |
| 7132821 | Reference current generation system Systems are provided for generating and distributing a plurality of reference currents on an integrated circuit. More particularly, an integrated circuit is provided which includes a reference current generating system. The reference current generating system includ... | 11/07/2006 |
| 7131033 | Substrate configurable JTAG ID scheme A circuit generally comprising a core circuit and a test access port circuit. The core circuit may be configurable among a plurality of functions in response to a signal. The test access port circuit may be configured to determine an identification value in response... | 10/31/2006 |
| 7119528 | Low voltage bandgap reference with power supply rejection A bandgap reference generation circuit utilizes two feedback loops to maintain the voltage at across the current sources to be essentially the same, such that the reference voltage remains constant over variations in process, temperature, and supply voltage. The acc... | 10/10/2006 |
| 7112948 | Voltage source circuit with selectable temperature independent and temperature dependent voltage outputs A voltage source includes first and second pn junctions which conduct the outputs of respective current sources to establish respective base-emitter voltages Vbe1 and Vbe2 at respective nodes; Vbe1 and Vbe2 can each be gen... | 09/26/2006 |
| 7112935 | Current sensor using mirror MOSFET and PWM inverter incorporating the same A current sensor has a power MOSFET Q1, connected between an electric load and a power supply, for controlling current that flows through said electric load, a mirror MOSFET Q2, connected in parallel to said power MOSFET Q1, in which a portion o... | 09/26/2006 |
| 7091713 | Method and circuit for generating a higher order compensated bandgap voltage A method and circuit are shown for generating a higher order compensated bandgap voltage is disclosed, in which a first order compensated bandgap voltage and a linearly temperature dependent voltage are generated. Thereafter, a difference between the linearly temper... | 08/15/2006 |
| 7081743 | Intelligent power supply and control method thereof Intelligent power supply and control method thereof. A power supply for altering an output power by detecting a power requirement of an electronic device and the electronic device having a memory. The power supply comprises a converter, a control device and a switch... | 07/25/2006 |
| 7061217 | Integrated power switching circuit A power switching circuit includes a power MOS transistor that has a maximum source-drain voltage substantially higher than a permissible gate-source voltage, and that has a current path connected in series with a load between first and second supply terminals, and ... | 06/13/2006 |
| 7030790 | Systems and methods for auto gain control in Bi-CMOS digital to analog converters The accuracy of output power in a digital-to-analog converter (DAC) is critical in certain applications. When bi-CMOS technology is used to implement a DAC, a number of factors affect the gain accuracy of the DAC. The present invention provides a circuit architectur... | 04/18/2006 |
| 7026824 | Voltage reference generator with negative feedback A voltage reference generator for generating an output voltage at an output node. A level shifter shifts a first reference voltage into the output voltage at the output node according to a shift between the first reference voltage and the output voltage, and a feedb... | 04/11/2006 |
| 7019677 | Current steering digital to analog converters with self-calibration, and systems and methods using the same A current steering digital to analog converter includes a current source for selectively providing a selected amount of current to an output in response to input data. The current source includes a selected number of sub-current sources for selectively providing fra... | 03/28/2006 |
| 7019581 | Current sense circuit A method and circuit for tracking a load current and a load voltage to provide an output signal that is proportional to the load current. The circuit enables employment of high gate area (W/L) ratio for a current mirror type current sense circuit, while maintaining ... | 03/28/2006 |
| 7015845 | Digital to analog converter system A control arrangement and method includes a digital to analog converter and a mode controller that is operative to provide the digital to analog converter with a plurality of reference voltage ranges (Vref) under a respective plurality of operating modes. ... | 03/21/2006 |
| 7012597 | Supply of a programming current to a pixel A data line drive circuit is equipped with a single line driver 300 and a gate voltage generation circuit 400. The single line driver 300 is constructed such that N groups (where N is an integer 2 or larger) of series connections of drive transi... | 03/14/2006 |
| 7009374 | Low resistance bandgap reference circuit with resistive T-network A CMOS bandgap reference (BGR) voltage generator circuit has a passive resistor T-network of low resistance connected between the inverting and non-inverting inputs of the op-amp in the circuit. The op-amp's output is connected to the gates of three PMOS transistors... | 03/07/2006 |
| 6995555 | Apparatus and method for determining a current through a power semiconductor component A circuit configuration includes a power switch and a measuring configuration for detecting the load current through the power switch. The circuit configuration utilizes a voltage drop across a connecting line, in particular a bonding wire, which is connected in ser... | 02/07/2006 |
| 6992473 | Current sensing circuit for DC/DC buck converters A circuit and a related method to sense the inductor current of CD/DC buck converters have been achieved. The inductor current is sensed by generation of a voltage drop across a fully integrated sense resistor. The voltage drop is proportional to the inductor curren... | 01/31/2006 |
