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Low power bandgap circuit - Patent 6788041 The bandgap reference circuit of claim 6, further comprising a second transistor and a third coupled to each other, wherein a drain terminal of the second transistor is coupled to the collector of the first transistor. The bandgap reference circuit of claim 13, where the source terminals of the second and the third transistors are coupled to source terminals of the fourth and fifth transistors. The bandgap reference circuit of claim 14, further comprising a sixth and a seventh transistor, wherein a drain terminal of the fourth transistor is coupled to a collector of the sixth transistor, and wherein a drain terminal of the fifth transistor is coupled to a collector of the seventh transistor. www.freepatentsonline.com /6788041.html   (0 words)

The Design of Band-Gap Reference Circuits: Trials and Tribulations This type of reference became popular as a stable voltage reference for low-voltage circuits, such as in 5-volt data acquisition systems where zener diodes are not suitable. The beauty of the band-gap reference is the summation of the Vbe term, which decreases at the rate of about -2 millivolts /°C, and the (delta-Vbe term) which grows at about + 2 millivolts /°C, to achieve an overall Temperature Coefficient (Tempco) that is substantially zero. Band-gap references are not normally thought of as low-noise devices, because of the high gains needed. www.national.com /rap/Application/0,1570,24,00.html   (0 words)

brokaw bandgap reference - Article and Reference from OnPedia.com A voltage reference circuit widely used in integrated circuits, with an output voltage around 1.25 V with only little temperature dependence. This particular circuit is one type of a bandgap voltage reference, named after the author of its first publication. * Brokaw, P., "A simple three-terminal IC bandgap reference", 'IEEE Journal of Solid-State Circuits', vol. www.onpedia.com /encyclopedia/brokaw-bandgap-reference   (77 words)

Performance reference voltage generator - Patent Review 6683444 Reference voltage generators may be used in a great number of applications such as converters in which it is necessary to have a voltage value that is precise and stable whatever the environmental conditions are. In this example the reference voltage is tapped from the second node B. For this purpose it is imposed that the temperature gradient of the voltage on the first node A is substantially equal and opposite to the voltage produced by the transistor Q5 of the output stage 14 to obtain the gradient compensation. The curve referred to as 1' corresponds to a voltage of 2.5 V, the curve referred to as 2' to a voltage of 2.7 V, the curve referred to as 3' to a voltage of 3 V. The curves are substantially flat over a large range of temperatures. www.wikipatents.com /6683444.html   (5746 words)

United States Patent: 6,432,753 Bandgap references are used in a wide variety of integrated systems where accurate and precise voltage references with excellent line regulation and temperature stability performance are required. Bandgap references are critical in systems such as linear and switching regulators, analog-to-digital converters, digital-to-analog converters, and other like circuits where accuracy and precision as a whole are in great demand. In another aspect of the invention, a bandgap reference circuit is fabricated using a thick metallic overcoat such as a simple copper overcoat to reduce electrical resistance. users.ece.gatech.edu /rincon-mora/patents/p6432753.htm   (3653 words)

U.S. Patent: 5325045 - Low voltage CMOS bandgap with new trimming and curvature correction methods - June 28, 1994   (Site not responding. Last check: ) The low voltage bandgap circuit of claim 1, wherein a size of each one of said second plurality of PNP transistors is a factor of N larger than a size of each corresponding one of said first plurality of PNP transistors. In a bandgap reference circuit having a device generating a Vbe term, an improved curvature correction means for inducing a current with increased positive temperature coefficient through said device. A bandgap reference circuit operates on the principle of compensating the negative temperature drift of the turn on voltage of a diode (V.sub.be) with the positive temperature coefficient (TC) of the thermal voltage (V.sub.t) to obtain a reference voltage with zero TC. www.everypatent.com /comp/pat5325045.html   (5610 words)

Integrated Circuit Cross Reference Continuing the freedom fromburdensome mathematical rigor integrated circuit cross reference and precedence that made the previous editions of this practical presentation of the technology so popular, the Third Edition is assured of its place as one of the most useful working references for a wide range of engineers. Brokaw bandgap reference - Brokaw bandgap reference is a voltage reference circuit widely used in integrated circuits, with an output voltage around 1.25 V with only little temperature dependence. Reference circuit - In telecommunication, a reference circuit is a hypothetical electric circuit of specified equivalent length and configuration, and having a defined transmission characteristic or characteristics, used primarily as a reference for measuring the performance of other, i.e. el83.marassirma.com /integratedcircuitcrossreference.html   (1167 words)

Science Fair Projects - Bandgap voltage reference A bandgap voltage reference is a voltage reference circuit widely used in integrated circuits, usually with an output voltage around 1.25 V, close to the theoretical bandgap of silicon at 0 K. The operation principle of bandgap voltage references is in principle simple. The resulting voltage is about 1.2–1.3 V, depending on the particular technology, and is close to the theoretical bandgap of silicon at 0 K. The remaining voltage change over the operating temperature of typical integrated circuits is on the order of a few millivolts. Since the output voltage is by definition fixed around 1.25 V for typical bandgap reference circuits, the minimum operating voltage is about 1.4 V, as in a CMOS circuit at least one drain-source voltage of a FET (field effect transistor) has to be added. www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Bandgap_voltage_reference   (456 words)

U.S. Patent: 6172555 - Bandgap voltage reference circuit - January 9, 2001   (Site not responding. Last check: ) A bandgap voltage reference circuit wherein a voltage change is induced across one element to compensate for the temperature-induced voltage change across another element. These prior art references are representative of efforts to improve the stability of bandgap voltage reference sources at the expense of circuit complexity and an increase in the stringency of the component matching requirements. The output reference voltage (V.sub.OUT) 154 presented across terminals 123 and 142 is equal to the sum of the base to emitter voltage V.sub.BE 178 of the bipolar junction transistor 164 and the voltage V.sub.R1 182 across the first resistor 104. www.everypatent.com /comp/pat6172555.html   (3527 words)

Silicon bandgap temperature sensor - Wikipedia, the free encyclopedia The silicon bandgap temperature sensor is an extremely common form of temperature sensor (thermometer) used in electronic equipment. Its main advantage is that it can be included in a silicon integrated circuit at very low cost. An electronic circuit, such as the Brokaw bandgap reference, that measures ΔV en.wikipedia.org /wiki/Silicon_bandgap_temperature_sensor   (191 words)

07.02.98 ADSL chip sets trim down with G.lite The DV bandgap reference is the heart of nearly all IC temperature sensors. First, the term "bandgap" is something of a misnomer: It refers to the bandgap voltage of silicon, which is 1.12V at room temperature. Excessive leakage current causes malfunctions in bandgap references and signal-conditioning circuitry. www.edn.com /archives/1998/070298/14df3.htm   (1722 words)

About bandgap reference and voltage reference circuit? a bandgap reference circuit is a voltage reference circuit with its output voltage almost temperature independent. Bandgap reference is one of voltage reference circuits. Bandgap is a very good voltage reference because it is independent of power supply whereby other circuit like MOS or resistor divider also could be a reference voltage but these circuit tend to vary the output once the power supply or process change. www.edaboard.com /ftopic134705.html   (485 words)

Brokaw bandgap reference - Encyclopedia, History, Geography and Biography Brokaw bandgap reference - Encyclopedia, History, Geography and Biography Brokaw bandgap reference is a voltage reference circuit widely used in integrated circuits, with an output voltage around 1.25 V with only little temperature dependence. This particular circuit is one type of a bandgap voltage reference, named after the author of its first publication. www.arikah.net /encyclopedia/Brokaw_bandgap_reference   (106 words)

Bandgap reference voltage generator A bandgap reference voltage generator consists of a plurality of transistors with the same geometry. One reference potential generating circuit that is particularly desirable is the so-called "band-gap reference" circuit. 2 are a voltage reference generator with a V.sub.BG equal to the bandgap voltage of silicon transistors Q2 and Q11-Q16, R11-R16 equal to R2 and an output voltage with a nearly zero temperature coefficient. www.skk-banjaluckapivara.com /invent/driver_bar_assembly/bandgap_reference_voltage_generator.html   (2459 words)

Rajarshi Paul : Research Works   (Site not responding. Last check: ) A good second-order reference designed to perform better than a simple first-order reference over temperature may exhibit worse test results if the process variation errors are ignored and not properly addressed through post-fabrication trimming design. The second-order bandgap circuit is designed in a 0.5µm BiCMOS process with opamp structure to study the additional effect of trimming the input offset error of the opamp. The bandgap voltage is obtained through a mixed-mode topology, which has the added flexibility for obtaining high precision second-order temperature compensation. www.vlsi.iitkgp.ernet.in /~rpaul/rpaper.html   (424 words)

Linearly acting - Patent Storm   (Site not responding. Last check: ) A voltage regulator comprises a differential amplifier for comparing an output of a reference voltage circuit with an output of a voltage dividing circuit and outputting a first signal and a phase compensating circuit having a resistor and a capacitor connected in series. A reference cell produces a reference current that is about half of the current produced by a memory cell. An error amplifier controls the gate of the MOS transistor by comparing the regulator output voltage to a reference voltage that is generated by a reference circuit. www.patentstorm.us /class/323/273-Linearly_acting.html   (3422 words)

Bandgap voltage reference - Encyclopedia, History, Geography and Biography Bandgap voltage reference - Encyclopedia, History, Geography and Biography A bandgap voltage reference is a voltage reference circuit widely used in integrated circuits, usually with an output voltage around 1.25 V, close to the theoretical bandgap of silicon at 0 K. The operation principle of bandgap voltage references is quite straightforward. The resulting voltage is about 1.2–1.3 V, depending on the particular technology, and is close to the theoretical bandgap of silicon at 0 K. The remaining voltage change over the operating temperature of typical integrated circuits is on the order of a few millivolts. www.arikah.net /encyclopedia/Bandgap_voltage_reference   (337 words)

Brokaw, (Thomas John) Tom - Hutchinson encyclopedia article about Brokaw, (Thomas John) Tom He was KNBC late-night anchor in Los Angeles 1965–73. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. encyclopedia.farlex.com /Brokaw%2c+(Thomas+John)+Tom   (130 words)

Power Management DesignLine | Inside the Belly of the Beast: A Map for the Wary Bandgap Reference Designer when ... A "bandgap" produces a voltage that is temperature independent by adding a voltage that increases with temperature, i.e., has proportional-to-absolute-temperature or PTAT dependence, to a voltage that decreases linearly with temperature, i.e., has complementary-to-absolute-temperature or CTAT dependence, as shown in Figure 1. Most bandgap references are based on the circuit presented in the classical paper by Brokaw in 1974 [1]. These stresses affect the bandgap reference voltage by effectively changing the value of the base-emitter voltage of the bipolar transistor, a phenomenon otherwise known as piezo-junction effect. www.powermanagementdesignline.com /showArticle.jhtml?articleID=60402040   (0 words)

Integrated Circuit Cross Reference Ideal both as a complete reference for mixed-signal circuit designs, and perhaps the reason they are replacing analog-only designs in the thousandths-of-pennies. It is the most respected, reliable, and indispensable reference tool for technical professionals around the globe. The third edition now offers an even more extensive range of topics, with extended coverage of practical areas such as television or newspapers spend the vast majority of their time as digital information, being converted to analog only for a wide range of electronic circuits, including amplifiers, logic circuits, power supplies and oscillators. el1.maptohealthandwealth.com /integratedcircuitcrossreference.html   (1358 words)

Low offset bandgap voltage reference Number:7,211,993 from the United States Patent and Trademark Office (PTO) ... The circuit as claimed in claim 13 wherein the source of the MOS transistor is coupled to the emitter of a bipolar transistor, the collector of the bipolar transistor is coupled to a reference potential, and the base of the bipolar transistor is coupled to the resistor. In such embodiments, the source of the MOS transistor may be coupled to the emitter of a bipolar transistor, the collector of the bipolar transistor being coupled to a reference potential, and the base of the bipolar transistor being coupled to the resistor. The reference voltage of the circuit is provided at a node between transistor Q10 and the base of transistor Q7, and as such is directly tapped from the second stage of the amplifier. www.linkgrinder.com /Patents/Low_offset_band_7211993.html   (0 words)

Integrated Circuit Cross Reference Importance The transistor is a solid textbook and reference for high-level, ASIC-design entry. In field-effect transistors (FET)s, the three terminals are called gate (G), source (S) and drain (D) respectively, and it is often less expensive to simply use a few million transistors and the response of these integrated circuits (IC) to ESD phenomena. Importance The transistor is considered by many to be an invaluable reference for the ESD design, optimization, integration and synthesis of these elements and concepts into ESD networks, as well as ESD power clamps networks. ca51.mmtfinancial.com /integratedcircuitcrossreference.html   (1186 words)

Electronic circuits Brokaw bandgap reference is a voltage reference circuit widely used in integrated circuits, with an output voltage around 1.25 V with only little temperature dependence. A chopper circuit is used to refer to numerous types of electronic switching devices and circuits. More generally, the term is also used to refer to a device that compares two items of data. www.shortopedia.com /E/L/Electronic_circuits   (1150 words)

Tom Brokaw Thomas John Brokaw (born February 6, 1940 in Webster, South Dakota) is a popular USA television journalist, presently working on regularly scheduled news documentaries for the NBC television network, and is the former NBC News anchorman/ managing editor of the program NBC Nightly News with Tom Brokaw. Brokaw also hosted, wrote, and moderated special programs on a wide range of topics. Brokaw serves on the Howard University School of Communications Board of Visitors and on the boards of trustees of the University of South Dakota, the Norton Simon Museum, and the American Museum of Natural History. www.kiwipedia.com /tom-brokaw.html   (179 words)

Integrated circuit temperature sensor with a programmable offset (US5519354) A second resistor is connected from the first resistor to a reference voltage terminal to provide voltage gain. A current source is positioned between the transistor's emitter and the reference voltage terminal to supply its emitter current and the current for the third resistor. is substantially the same as a voltage applied to said reference terminal at a desired temperature. www.delphion.com /details?pn10=US05519354   (476 words)

PlanetAnalog.com - Bandgaps in the crosshairs: What's the trim target? Bandgap references may be relatively robust and accurate but not immune to process variations and mismatch offsets whose adverse effects on accuracy varies across devices, wafers, lots, and technology nodes, making each device unique. A reference circuit generates a predictable temperature-independent voltage by summing voltages and/or currents with opposite temperature-drift coefficients. In the case of a bandgap reference, thermal voltage V www.planetanalog.com /article/printableArticle.jhtml?articleID=193400587   (1449 words)

CMOS voltage reference (US6441680) A CMOS reference voltage generating circuit is described that produces a reference voltage by taking the difference between the gate-source voltages of two p-type and n-type CMOS transistors operating in the saturation region, one of the gate-source voltages being multiplied by a gain factor. Banba, Hironori et al, "A CMOS Bandgap Reference Circuit with Sup-1-V Operation", IEEE Journal of Solid-State Circuits, vol. Blauschild, Robert A., "A new NMOS Temperature-Stable Voltage Reference", IEEE Journal of Solid-State Circuits, vol. www.delphion.com /details?pn=US06441680__   (399 words)

IC Temperature Sensors Find the Hot Spots - Maxim/Dallas bandgap reference is the heart of nearly all IC temperature sensors. This principle underlies one of the most widely used IC cells in history, the Brokaw bandgap reference (Figure 1). You find this design or its close relative as part of the bias-current generator in the startup circuit of nearly every IC ever made—digital or analog. www.maxim-ic.com /appnotes.cfm/appnote_number/689/ln/en   (0 words)

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