US Patent No: 7,129,873

Number of patents in Portfolio can not be more than 2000

Variable-order delta sigma modulator and DA converter

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ALSO PUBLISHED AS: 20050088328
ATTORNEY / AGENT: (SPONSORED)
 

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Abstract

The variable-order delta sigma modulator of the invention is capable of setting an optimum order in relation to a sampling frequency to be used, when using one out of plural sampling frequencies. As to the delta sigma modulator of the third order or higher, in a combination of two arbitrary continued integrators constituting the modulator is furnished a means that connects or disconnects the circuit on the second integrator side at the part of connecting the first integrator and the second integrator, or a means of switching the relation of connections. Connecting or disconnecting the circuit through the means and switching the relation of connections will set the order of the delta sigma modulator into an optimum order in relation to a sampling frequency.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ROHM CO., LTD.KYOTO2951

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawamura, Akinobu Kyoto, JP 8 54

Cited Art

Patent Info (Count) # Cites Year
 
CIRRUS LOGIC, INC. (2)
5,274,375 Delta-sigma modulator for an analog-to-digital converter with low thermal noise performance 61 1992
6,556,159 Variable order modulator 18 2001

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CYPRESS SEMICONDUCTOR CORPORATION (29)
8,149,048 Apparatus and method for programmable power management in a programmable analog circuit block 2 2001
8,176,296 Programmable microcontroller architecture 0 2001
8,103,496 Breakpoint control in an in-circuit emulation system 0 2001
7,765,095 Conditional branching in an in-circuit emulation system 2 2001
8,078,970 Graphical user interface with user-selectable list-box 1 2001
8,069,405 User interface for efficiently browsing an electronic document using data-driven tabs 0 2001
7,844,437 System and method for performing next placements and pruning of disallowed placements for programming an integrated circuit 0 2001
7,774,190 Sleep and stall in an in-circuit emulation system 1 2001
7,770,113 System and method for dynamically generating a configuration datasheet 2 2001
8,103,497 External interface for event architecture 0 2002
7,761,845 Method for parameterizing a user module 2 2002
8,089,461 Touch wake for electronic devices 0 2005
8,085,067 Differential-to-single ended signal converter circuit and method 1 2006
8,067,948 Input/output multiplexer bus 0 2007
7,825,688 Programmable microcontroller architecture(mixed analog/digital) 1 2007
8,069,428 Techniques for generating microcontroller configuration information 5 2007
8,049,569 Circuit and method for improving the accuracy of a crystal-less oscillator having dual-frequency modes 0 2007
8,092,083 Temperature sensor with digital bandgap 0 2007
7,893,724 Method and circuit for rapid alignment of signals 0 2007
8,402,313 Reconfigurable testing system and method 0 2007
8,026,739 System level interconnect with programmable switching 4 2007
7,737,724 Universal digital block interconnection and channel routing 1 2007
8,085,100 Poly-phase frequency synthesis oscillator 0 2008
8,078,894 Power management architecture, method and configuration system 1 2008
8,040,266 Programmable sigma-delta analog-to-digital converter 1 2008
8,130,025 Numerical band gap 0 2008
8,370,791 System and method for performing next placements and pruning of disallowed placements for programming an integrated circuit 0 2008
8,120,408 Voltage controlled oscillator delay cell and method 0 2008
8,358,150 Programmable microcontroller architecture(mixed analog/digital) 0 2010
 
REALTEK SEMICONDUCTOR CORP. (5)
7,277,032 Low-pass filter based delta-sigma modulator 1 2005
7,301,489 Dithering noise cancellation for a delta-sigma modulator 1 2005
7,324,028 Self-calibrating continuous-time delta-sigma modulator 1 2006
7,321,325 Background calibration of continuous-time delta-sigma modulator 0 2006
7,446,687 Method and apparatus to reduce internal circuit errors in a multi-bit delta-sigma modulator 3 2007
 
BROADCOM CORPORATION (3)
7,515,071 Method and system for audio CODEC voice ADC processing 9 2006
7,936,288 Method and system for audio CODEC voice ADC processing 1 2009
8,169,344 Method and system for audio CODEC voice ADC processing 0 2011
 
ALTERA CORPORATION (1)
8,405,535 Integrated circuit with configurable analog to digital converter 0 2011
 
PANASONIC CORPORATION (1)
7,532,138 Delta-sigma modulator and DA converter apparatus including delta-sigma modulator changing order of filter 4 2008

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