Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8174308 | DC slope generator A system for generating a tunable DC slope includes: a first stage, supplied with an external voltage, for receiving a process, voltage and temperature (PVT) insensitive reference voltage and generating a voltage independent current; a second stage, coupled to the f... | 05/08/2012 |
| 8169256 | Bandgap reference circuit with an output insensitive to offset voltage A circuit includes an operational amplifier including a first input and a second input. A first resistor has a first end coupled to the first input. A first bipolar transistor includes a first emitter coupled to a second end of the first resistor, and a first base. ... | 05/01/2012 |
| 8149047 | Bandgap reference circuit with low operating voltage A bandgap reference circuit comprising a current mirror, an operational amplifier, first and second BJT transistors is disclosed. The current mirror comprises a first input terminal, a second input terminal and at least one output terminal. The operational amplifier... | 04/03/2012 |
| 8143940 | Internal supply voltage generating circuit and method for generating internal supply voltage An internal supply voltage generating circuit includes a clock comparator configured to compare a first clock signal having clock information corresponding to a level of a reference voltage with a second clock signal having clock information corresponding to a level... | 03/27/2012 |
| 8120415 | Circuit for generating a temperature-compensated voltage reference, in particular for applications with supply voltages lower than 1V An embodiment of a circuit is described for the generation of a temperature-compensated voltage reference of the type comprising at least one generator circuit of a band-gap voltage, inserted between a first and a second voltage reference and including an operationa... | 02/21/2012 |
| 8106707 | Curvature compensated bandgap voltage reference Embodiments of the present invention include systems and methods for generating a curvature compensated bandgap voltage reference. In an embodiment, a curvature compensated bandgap reference voltage is achieved by injecting a temperature dependent current at differe... | 01/31/2012 |
| 8102201 | Reference circuit and method for providing a reference A reference circuit configured to provide a reference value. The circuit includes a first circuit unit which is configured to provide a first electrical representation that varies linearly with temperature and has a crossover point where its polarity relative to zer... | 01/24/2012 |
| 8026756 | Bandgap voltage reference circuit A voltage reference circuit is provided with: an operational amplifier circuit; first and second resistor elements; first and second diodes; and first and second transistors. The first resistor element and the first diode are connected in series between a first inpu... | 09/27/2011 |
| 8022751 | Systems and methods for trimming bandgap offset with bipolar elements An integrated circuit has an untrimmed bandgap generation circuit; and a bandgap generation circuit coupled to the untrimmed bandgap generation circuit. The bandgap generation circuit has a current source controlled by the untrimmed bandgap generation circuit and co... | 09/20/2011 |
| 8022752 | Voltage reference circuit for low supply voltages A voltage reference circuit and method for generating a reference voltage using the circuit uses a comparison of the voltages on first and second nodes of a diode resistor network to produce a comparison signal, which is then used to increase the voltage on an outpu... | 09/20/2011 |
| 8008966 | Start-up circuit for generating bandgap reference voltage Disclosed is a start-up circuit that can stably and rapidly start up a bandgap reference voltage generating circuit when the bandgap reference voltage generating circuit is switched from a sleep mode to an operation mode, even if a difference in electrical character... | 08/30/2011 |
| 7994849 | Devices, systems, and methods for generating a reference voltage Methods, devices, and systems are disclosed for a voltage reference generator. A voltage reference generator may comprise a bandgap voltage reference circuit configured to output two complementary-to-absolute-temperature (CTAT) signals. The voltage reference generat... | 08/09/2011 |
| 7994848 | Low power voltage reference circuit An embodiment of the present invention is directed to a low power voltage reference circuit. The circuit includes a first circuit for generating a PTAT voltage without using an operational amplifier. The circuit also includes a second circuit for generating the refe... | 08/09/2011 |
| 7973593 | Reference voltage generation circuit and start-up control method therefor To solve the problem of the conventional reference voltage generation circuit in that an output voltage exceeds a predetermined voltage value, there is provided a reference voltage generation circuit including: a voltage generation circuit provided between a first p... | 07/05/2011 |
| 7948304 | Constant-voltage generating circuit and regulator circuit A constant-voltage generating circuit includes: a reference potential generating unit; first and second amplifier units whose outputs are respectively connected to the output line; and a low-pass filter, and wherein first and second operation periods are repeated, o... | 05/24/2011 |
| 7944283 | Reference bias generating circuit A reference current bias circuit includes a self-bias circuit configured to provide a bias current to an amplifier; a basic bandgap circuit coupled to inputs of the amplifier; a startup circuit configured to support an initial operation of the amplifier; a temperatu... | 05/17/2011 |
| 7932772 | Curvature-compensated band-gap voltage reference circuit A band-gap reference voltage is developed by a phase-clocked band-gap circuit including a single PN junction through which first and second constant currents are alternately directed. A current proportional to absolute temperature is selectively added to one of the ... | 04/26/2011 |
| 7902912 | Bias current generator A bias current generator for generating bias current is described. The generator comprises an amplifier having an inverting input, a non-inverting input and an output. A first bipolar transistor is associated with one of the inverting and non-inverting inputs of the... | 03/08/2011 |
| 7898320 | Auto-nulled bandgap reference system and strobed bandgap reference circuit An auto-nulled bandgap reference system employing a substrate bandgap reference circuit with primary and auxiliary amplifiers and a switching circuit which in a first mode develops a voltage to null the offset and noise errors of the auxiliary amplifier and then in ... | 03/01/2011 |
| 7880533 | Bandgap voltage reference circuit A bandgap voltage reference circuit which provides a bandgap reference voltage without requiring a resistor. The circuit comprises an amplifier having an inverting input, a non-inverting input and an output. First and second bipolar transistors are provided which op... | 02/01/2011 |
| 7880534 | Reference circuit for providing precision voltage and precision current A reference circuit for providing a precision voltage and a precision current includes a bandgap voltage reference circuit, a positive temperature coefficient calibrating circuit, a threshold voltage superposing circuit and precision current generator interconnected... | 02/01/2011 |
| 7868686 | Band gap circuit Provided is a band gap constant-voltage circuit which is configured by combining a PMOS transistor, an NMOS transistor, a bipolar transistor, and a resistor, and is capable of preventing an output voltage from being stabilized at 0 V immediately after power supply f... | 01/11/2011 |
| 7843254 | Methods and apparatus to produce fully isolated NPN-based bandgap reference Generating a bandgap reference by generating a first current in a first circuit and a second current in a second circuit, a control circuit forcing the first and second currents to have a first magnitude proportional-to-temperature. Generating a third current in a t... | 11/30/2010 |
| 7839202 | Bandgap reference circuit with reduced power consumption A bandgap voltage reference circuit and methods for generating a bandgap reference voltage are disclosed. An operational amplifier receives first and second input voltages from a first and second current path, respectively. A buffer stage is coupled to an output of ... | 11/23/2010 |
| 7834682 | Reference voltage generation circuit and semiconductor storage apparatus using the same According to an aspect of the present invention, there is provided a reference voltage generation circuit including: a first circuit configured to generate a first voltage that is independent of a power supply voltage and that is dependent of a temperature; a second... | 11/16/2010 |
| 7816976 | Power supply circuit using insulated-gate field-effect transistors A power supply circuit is disclosed. The power supply circuit is provided with a reference voltage generation circuit to receive a voltage from a higher voltage supply so as to generate a reference voltage. The reference voltage from the reference voltage generation... | 10/19/2010 |
| 7808305 | Low-voltage band-gap reference voltage bias circuit A low-voltage band-gap reference voltage bias circuit is provided. In the low-voltage band-gap reference voltage bias circuit, a proportional-to-absolute temperature (PTAT) current is copied to two nodes, respectively, to generate a first voltage having a negative s... | 10/05/2010 |
| 7804354 | Circuit architecture for radiation resilience A system and method for extending the operating life of a device susceptible to defects caused by total ionizing dose radiation and/or bias dependent degradation are described. The device is replicated at least once and at least one switching mechanism is used to cy... | 09/28/2010 |
| 7786792 | Circuits, architectures, apparatuses, systems, and methods for low noise reference voltage generators with offset compensation Circuits, architectures, systems, and methods for generating temperature-stable reference voltages with offset compensation. The circuits generally include a diode junction voltage generator, and three composite voltage generators configured to operate in first and ... | 08/31/2010 |
| 7777558 | Bandgap reference circuit A bandgap reference circuit generating bandgap reference voltage/current. The bandgap reference circuit generates a negative temperature coefficient current (ICTAT) and the first and the second positive temperature coefficient currents (IPTAT a... | 08/17/2010 |
| 7772920 | Low thermal hysteresis bandgap voltage reference A first and a second group of individual transistors in a voltage reference may collectively function as a first and a second composite transistor with a first and a second emitter area equal to the combined areas of the emitters of the first and the second groups o... | 08/10/2010 |
| 7768343 | Start-up circuit for bandgap reference A start-up circuit for a bandgap reference circuit includes a sampling circuit for sampling current through a diode in one of first and second diode/resistor networks that respectively provide complementary PTAT and CTAT characteristics in the bandgap reference, and... | 08/03/2010 |
| 7750728 | Reference voltage circuit A reference voltage circuit which is less dependent on semiconductor process variations compared to bandgap based reference voltage circuits. The circuit comprises a first amplifier having an inverting input, a non-inverting input and an output. A current biasing ci... | 07/06/2010 |
| 7737768 | Internal voltage generator An internal voltage generator of a semiconductor memory device generates an internal voltage sensitive to a change in a temperature. The internal voltage generator includes a reference voltage generator, an internal voltage detecting unit and an internal voltage pum... | 06/15/2010 |
| 7714640 | No-trim low-dropout (LDO) and switch-mode voltage regulator circuit and technique An optimized output voltage circuit and technique obtainable without trimming is set forth. A voltage reference circuit and method devoid of trim resistors comprising a high gain amplifier, a plurality of bandgap resistors, and at least a plurality of bipolar device... | 05/11/2010 |
| 7705662 | Low voltage high-output-driving CMOS voltage reference with temperature compensation A bandgap reference voltage generator has a first stage that generates a first current that is complementary-to-absolute-temperature (Ictat) and a second stage that generates a current that is proportional-to-absolute-temperature (Iptat). The Ictat and Iptat current... | 04/27/2010 |
| 7692481 | Band-gap reference voltage generator for low-voltage operation and high precision Provided is a band-gap reference voltage generator for low-voltage operation and high precision. The band-gap reference voltage generator minimizes voltage drop by connecting resistors in parallel to bipolar transistors, and cancels temperature dependence by properl... | 04/06/2010 |
| 7683701 | Low power Bandgap reference circuit with increased accuracy and reduced area consumption Bandgap reference (BGR) circuits and methods are described herein for providing high accuracy, low power Bandgap operation when using small, low voltage devices in the analog blocks of the BGR circuit. In some cases, chopped input stabilization and dynamic current m... | 03/23/2010 |
| 7675353 | Constant current and voltage generator A compact constant current generator that can operate with a positive supply voltage of 1.22 V (or lower) and minimize noise is provided. The constant current generator can include a bandgap reference circuit and a single gain stage. Notably, the bandgap reference c... | 03/09/2010 |
| 7636009 | Bias current generating apparatus with adjustable temperature coefficient There is provided a bias current generating apparatus capable of providing a bias current where a characteristic change is compensated, to one of an analog circuit and RF circuit where various characteristic changes occur according to a temperature, by generating bi... | 12/22/2009 |
