AU2001240033A1 - Fast ramping of control voltage with enhanced resolution - Google Patents

Fast ramping of control voltage with enhanced resolution

Info

Publication number
AU2001240033A1
AU2001240033A1 AU2001240033A AU4003301A AU2001240033A1 AU 2001240033 A1 AU2001240033 A1 AU 2001240033A1 AU 2001240033 A AU2001240033 A AU 2001240033A AU 4003301 A AU4003301 A AU 4003301A AU 2001240033 A1 AU2001240033 A1 AU 2001240033A1
Authority
AU
Australia
Prior art keywords
dac
ramp
control voltage
output
reference voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2001240033A
Inventor
Rodney Owen Williams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ericsson Inc
Original Assignee
Ericsson Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Inc filed Critical Ericsson Inc
Publication of AU2001240033A1 publication Critical patent/AU2001240033A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L3/00—Starting of generators

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Dc-Dc Converters (AREA)
  • Analogue/Digital Conversion (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Details Of Television Scanning (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

A logic circuit for generating a control voltage includes a ramp DAC and a main DAC. When the control voltage is needed, such as when an associated crystal oscillator is being "turned on," an input reference voltage is supplied to both the ramp DAC and the main DAC. The ramp DAC generates an output based on the input reference voltage and L supplied control bits for a (preferably short) ramp time period. The output from the ramp DAC is fed to a filter circuit that includes a capacitor to charge the capacitor and the control voltage is generated at least in part from the ramp DAC output as filtered by the capacitor. When the ramp period ends, the state of the input reference voltage is changed and the output from the main DAC, based on the changed input reference voltage and N control bits, is input to the filter. Such a two DAC arrangement allows for a shorter time constant circuit to be employed in association with the ramp DAC and a longer time constant circuit to be employed in association with the main DAC, allowing for quick ramp up of the control voltage.
AU2001240033A 2000-04-06 2001-03-05 Fast ramping of control voltage with enhanced resolution Abandoned AU2001240033A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/544,583 US6353403B1 (en) 2000-04-06 2000-04-06 Fast ramping of control voltage with enhanced resolution
US09544583 2000-04-06
PCT/US2001/006879 WO2001078237A1 (en) 2000-04-06 2001-03-05 Fast ramping of control voltage with enhanced resolution

Publications (1)

Publication Number Publication Date
AU2001240033A1 true AU2001240033A1 (en) 2001-10-23

Family

ID=24172779

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001240033A Abandoned AU2001240033A1 (en) 2000-04-06 2001-03-05 Fast ramping of control voltage with enhanced resolution

Country Status (7)

Country Link
US (1) US6353403B1 (en)
EP (1) EP1273101B1 (en)
CN (1) CN1422456A (en)
AT (1) ATE310337T1 (en)
AU (1) AU2001240033A1 (en)
DE (1) DE60115002D1 (en)
WO (1) WO2001078237A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8331176B2 (en) * 2009-11-30 2012-12-11 Intel Corporation Method and system for evaluating effects of signal phase difference on a memory system
US8582374B2 (en) 2009-12-15 2013-11-12 Intel Corporation Method and apparatus for dynamically adjusting voltage reference to optimize an I/O system
KR101754111B1 (en) * 2011-01-03 2017-07-06 페어차일드코리아반도체 주식회사 Adaptive overvoltage protection circuit and method, and power system including the same
JP2019134230A (en) * 2018-01-29 2019-08-08 ソニーセミコンダクタソリューションズ株式会社 Dac circuit, solid-state imaging element, and electronic device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094480A (en) 1976-08-23 1978-06-13 Edo-Aire Mitchell Aircraft altitude hold system
JPH05304467A (en) 1992-04-24 1993-11-16 Ricoh Co Ltd Oscillation circuit
JPH0613898A (en) * 1992-06-29 1994-01-21 Nec Corp Frequency synthesizer
JP3311153B2 (en) 1994-07-14 2002-08-05 三菱電機株式会社 Automatic frequency control device
JP3460913B2 (en) * 1995-09-29 2003-10-27 旭化成マイクロシステム株式会社 Variable delay time generating circuit and method
GB2317279B (en) 1996-09-11 2001-01-24 Nec Technologies Frequency synthesisers
US6232759B1 (en) * 1999-10-21 2001-05-15 Credence Systems Corporation Linear ramping digital-to-analog converter for integrated circuit tester

Also Published As

Publication number Publication date
US6353403B1 (en) 2002-03-05
EP1273101A1 (en) 2003-01-08
WO2001078237B1 (en) 2002-05-16
EP1273101B1 (en) 2005-11-16
DE60115002D1 (en) 2005-12-22
CN1422456A (en) 2003-06-04
ATE310337T1 (en) 2005-12-15
WO2001078237A1 (en) 2001-10-18

Similar Documents

Publication Publication Date Title
TW376470B (en) Reference voltage generating circuit
MX9706979A (en) Direct digital synthesizer driven pll frequency synthesizer with clean-up pll.
NO20040455L (en) Power supply for direct and alternating current and with two inputs and programmable direct current output based on a secondary spring converter.
TW200509752A (en) Power supply for lighting
GB2437025A (en) Digital to analogue conversion
KR920020820A (en) Reference current generating circuit
WO2004008639A3 (en) Ring oscillator with frequency stabilization
TW338870B (en) Oscillator and phase-locked loop employing the same
MY106617A (en) Cmos driver circuit.
CA2154812A1 (en) Fast Acting Control System
TW333699B (en) The output driver for mixed supply voltage system
AU2001240033A1 (en) Fast ramping of control voltage with enhanced resolution
KR890012436A (en) Power controller
WO1998029950A3 (en) Internal voltage references output driver
TW346726B (en) Ring oscillator for semiconductor device
EP0921635A4 (en) Power amplifier device
KR970019767A (en) Continuous Feedback Control System of Electronic Ballast and Its Control Method
JPS5531324A (en) Transient noise preventing circuit
JPS5792904A (en) Power amplifier
ES2065282A2 (en) Switch mode power supply with shortcircuit current limitation.
HUT45789A (en) Switching arrangement
JPS5595408A (en) Amplifier circuit with shock-sound prevention circuit
JPS6441912A (en) Constant voltage circuit
KR830008560A (en) Horizontal oscillator
JPS57207421A (en) Waveform shaping circuit