Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 8049555 | Low leakage sampling switch An electronic device includes a cascade of a plurality of transistors. Each transistor of the cascade receives an input voltage at a first terminal of its source/drain channel and receives a sampling clock signal at a control gate. The second terminal of the source/... | 11/01/2011 |
| 7598801 | Voltage regulator, voltage regulating method thereof and voltage generator using the same A voltage regulator and a voltage regulating method thereof and a voltage generator using the voltage regulator are disclosed by the present invention. The voltage regulator of the present invention uses a first switching unit and a second switching unit to respecti... | 10/06/2009 |
| 7477095 | Current mirror architectures A current mirror has an input bipolar device and an output bipolar device, a first MOSFET device to control a current in the input bipolar device, and a second MOSFET device to control a bias current to common base terminals of the input and output bipolar devices. ... | 01/13/2009 |
| 7423416 | Voltage regulator and method for providing a regulated output A voltage regulator includes first and second MOS transistors and a bipolar transistor. The first MOS transistor has a first conductivity type and has a drain coupled to a first power supply voltage terminal, a gate for receiving a first bias voltage, and a source. ... | 09/09/2008 |
| 7400188 | Voltage providing circuit A voltage providing circuit includes a protective circuit and a power supply circuit. The protective circuit includes a first transistor. A first control signal is input to a collector of the first transistor, a second control signal is input to a base of the first ... | 07/15/2008 |
| 7368975 | Methods and apparatus for reduced hardware multiple variable voltage generator A circuit is described that generates multiple voltages each having a common reference point. The circuit uses a feedback control loop to generate a center voltage, a first voltage generator, and a second voltage generator. The first voltage generator generates a fi... | 05/06/2008 |
| 7365589 | Bandgap reference circuit A bandgap reference circuit, taking two or more power supplies as the input power supply for outputting a reference voltage, includes a first reference circuit, a second reference circuit, a power selection circuit and a switch circuit. The first and second referenc... | 04/29/2008 |
| 7321255 | Voltage generating circuit, data driver and display unit A voltage generating circuit outputs a generated voltage corresponding to (a+b+c)-bit digital data from a plurality of generated voltages. The voltage generating circuit includes a first selector of each conductive type and 2a pieces of second selectors o... | 01/22/2008 |
| RE39918 | Direct current sum bandgap voltage comparator A direct current sum bandgap voltage comparator for detecting voltage changes in a power supply. The direct current sum bandgap voltage comparator includes a summing node, current sources connected to the summing node and the power supply, and an indicator circuit c... | 11/13/2007 |
| 7276948 | Reset circuit A reset circuit includes a power supply supplying a power supply voltage, and a band-gap reference that generates a voltage reference signal. A resistor start-up circuit is responsive to the voltage reference signal, and further responsive to an increase in the powe... | 10/02/2007 |
| 7262650 | Amplitude adjusting circuit An amplitude adjusting circuit comprises a first current mirror where a variable current of a variable current source is copied into each of 1st-3rd transistors; a second current mirror where the variable current is copied into each of 11th-13th transistors; a third... | 08/28/2007 |
| 7259543 | Sub-1V bandgap reference circuit A bandgap reference circuit is disclosed operating under a predetermined low voltage source. The circuit has a first circuit with a first differential amplifier for generating a first current, a second circuit with a second differential amplifier for generating a se... | 08/21/2007 |
| 7259624 | Low noise AC coupled amplifier with low band-pass corner and low power A low noise AC coupled amplifier having transistors sharing bias currents, and having a low band-pass corner frequency and consuming low power. The amplifier may be used in a magneto-resistive (MR) preamplifier to amplify a response from a MR sensor. Bipolar and MOS... | 08/21/2007 |
| 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 |
| 7248097 | Voltage-activated, constant current sink circuit Voltage-activated and accurate current sink, and method of providing same. In one aspect, a circuit for accurately sinking current includes a zener diode coupled to a power source at the cathode of the zener diode, and first and second transistors, where the first t... | 07/24/2007 |
| 7227389 | Circuit and method for compensating for offset voltage A circuit for compensating for an offset voltage in a PhotoDetector Integrated Circuit (PDIC). The circuit includes a temperature detection unit, a current transfer unit and a current adjustment unit. The temperature detection unit generates a current that varies wi... | 06/05/2007 |
| 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 |
| 7224210 | Voltage reference generator circuit subtracting CTAT current from PTAT current A voltage reference generator generates a stable reference voltage that is less than the bandgap voltage of silicon for power supply voltages less than 2V, yet provides sufficient voltage headroom to operate a current mirror. In one embodiment, the voltage reference... | 05/29/2007 |
| 7224208 | Voltage regulator which outputs a predetermined direct-current voltage with its extreme variation restrained A voltage regulator has a reference voltage generator that outputs a reference voltage based on first and second electrical source voltages, an output circuit which generates a predetermined direct-current voltage based on the reference voltage and generates a compa... | 05/29/2007 |
| 7218166 | Current stabilization circuit, current stabilization method, and solid-state imaging apparatus A circuit for stabilizing an electric current includes a constant voltage supplying circuit configured to supply a constant voltage, and a current generating circuit coupled to the constant voltage supplying circuit to generate an electric current based on a predete... | 05/15/2007 |
| 7215180 | Constant voltage circuit A constant voltage circuit is disclosed that includes an output control transistor and an overcurrent protection circuit. The overcurrent protection circuit includes a proportional current generation circuit part, a current division circuit part, a division ratio co... | 05/08/2007 |
| 7196555 | Apparatus and method for voltage conversion An apparatus includes an input port, an output port, a resistor, and a current amplifier. The current amplifier includes an input circuit and an output circuit. The resistor is coupled to the input port. The input circuit is coupled to the resistor and the output ci... | 03/27/2007 |
| 7170337 | Low voltage wide ratio current mirror A low voltage wide ratio current mirror circuit comprises an n times current mirror having an input port for receiving an input current and an m times current mirror coupled in series to the n times current mirror for resulting in an output current of (N*M the input... | 01/30/2007 |
| 7138854 | Integrated circuit delivering logic levels at a voltage independent from the mains voltage, with no attached regulator for the power section, and corresponding communication module The invention concerns an integrated circuit comprising means of delivering, on at least one output, a predetermined output voltage representative of a logic level, means of distributing a mains voltage and means of generating an internal voltage reference lower tha... | 11/21/2006 |
| 7129737 | Method for avoiding transients during switching processes in integrated circuits, and an integrated circuit In a method for avoiding transients during switching processes in integrated circuits, a module of the integrated circuit is switched from a first operating state to a second operating state, a load change occurring thereby. In this case, it is ensured that the occu... | 10/31/2006 |
| 7123081 | Temperature compensated FET constant current source A constant current source comprises a FET, a bandgap reference voltage source coupled to its gate terminal and a resistor coupled to its source terminal. The width and length of the FET are configured so that the temperature coefficient (TEMPCO) of Vgs of... | 10/17/2006 |
| 7113412 | Drive circuit and power supply apparatus In charging a gate of a NMOS transistor Q1, the charging speed is adjustable by varying a resistor R1. When an inputted pulse signal VIN reverses to a negative voltage, a diode D2 turns off. Then, current flows along a discharging loop formed by... | 09/26/2006 |
| 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 |
| 7098729 | Band gap circuit A band gap circuit, including a differential amplifier. In response to fluctuation of the voltage on the band gap circuit output terminal VOUT, a potential difference occurs at an inverting input terminal and a noninverting input terminal of the differential amplifi... | 08/29/2006 |
| 7092674 | Multi-mode band-gap current reference A multi-mode band-gap current reference includes a band-gap current mode module and an adjustable current source module. The band-gap current module provides a band-gap reference current and a voltage representation of the band-gap reference current. The adjustable ... | 08/15/2006 |
| 7061303 | Photoelectric leak current compensating circuit and optical signal circuit using same When a current mirror circuit is composed of transistors that inevitably form a parasitic photodiode between an epitaxial layer and a substrate layer because of structure of an integrated circuit, a photocurrent increases in proportional to an area of the epitaxial ... | 06/13/2006 |
| 7039384 | Low power band-gap current reference A low power supply band-gap current reference includes a 1st P-N junction device, a 2nd and P-N junction device, a 1st current source, a 2nd current source, a 1st resistor, a 2nd resistor, a 3rd ... | 05/02/2006 |
| 7026860 | Compensated self-biasing current generator A compensated current generator includes a first current source and a second current source coupled in series. The first and second current sources have temperature coefficients with opposite signs to produce a temperature compensated current. The first current sour... | 04/11/2006 |
| 7006159 | Adapter circuit for audio and video signals A circuit arrangement includes at least one adapter circuit (10). which amplifies an analog input signal of a low current (Ii) by an amplification factor (n) into a particularly analog output signal of a higher current (Io). The adapter ... | 02/28/2006 |
| 6967525 | Tail current generator circuit for bipolar/MOS differential pair to set precise transconductance Disclosed is a circuit and method for generating a tail current for a main reader amplifier (200) input stage using a scaled master differential stage (160) with a given offset to force a given output current, preceded by a balanced stage (150) ... | 11/22/2005 |
| 6960907 | Efficient low dropout linear regulator A linear voltage regulator circuit includes an external pass transistor that does not rely on internal compensation, provides high gain, and exhibits reduce silicon area and power requirements. Circuits according to the present invention provide sufficient bandwidth... | 11/01/2005 |
| 6940339 | Mobility proportion current generator, and bias generator and amplifier using the same A mobility proportion current generator comprises a voltage adder including a first MOS transistor, the voltage adder adding a voltage whose temperature dependency is small with respect to the mobility and a threshold voltage of the first MOS transistor to output a ... | 09/06/2005 |
| 6936998 | Power glitch free internal voltage generation circuit A power glitch free internal voltage generation circuit includes: a voltage divider for dividing level of an internal voltage; a reference voltage generator generating a reference voltage having a predetermined voltage level by dividing a level of an external voltag... | 08/30/2005 |
| 6933770 | Metal oxide semiconductor (MOS) bandgap voltage reference circuit A metal oxide semiconductor (MOS) bandgap voltage reference circuit with a plurality of dummy bipolar junction transistors (BJTs) coupled to the mismatched parasitic substrate BJTs for improving parasitic capacitance matching, thereby improving startup behavior of t... | 08/23/2005 |
| 6930538 | Reference voltage source, temperature sensor, temperature threshold detector, chip and corresponding system The invention relates to an electrical reference voltage source comprising: a first electrical current source (PTAT 101) adapted to produce a first current (14) proportional to a temperature; and a second electrical current source (CPTAT 102) ad... | 08/16/2005 |
