IP Library › Granted Patent US 7,956,781
Granted Patent B2
US 7,956,781 · App. 12/445,029 · Granted Jun 7, 2011

Analogue-to-digital converter apparatus and method of reusing an analogue-to-digital converter circuit

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Quick Facts
Patent No.
US 7,956,781
App. No.
12/445,029
Granted
Jun 7, 2011
Kind
B2
Abstract

An analogue-to-digital converter apparatus comprises a first integrator coupled to a second integrator. The first and second integrators are coupled so as to provide a complex pole. The first integrator is selectively electrically decoupleable from the second integrator, thereby removing the complex pole.

Claims (23)

1. An analogue-to-digital converter apparatus comprising:

a first integrator;

a second integrator, the first integrator coupled to a second integrator so as to provide a complex pole, the first integrator being selectively electrically decouplable from the second integrator so as to remove the complex pole.

2. An apparatus as claimed in claim 1 , wherein the complex pole is a non-conjugate pole.

3. An apparatus as claimed in claim 1 , wherein the first integrator is coupled to the second integrator during a first period of time and the first integrator is electrically decoupled from the second integrator during a second period of time subsequent to the first period of time.

4. An apparatus as claimed in claim 1 , wherein the first integrator is cross-coupled with the second integrator.

5. An apparatus as claimed in claim 1 , wherein the first integrator is independently operable from the second integrator when the first integrator is electrically decoupled from the second integrator.

6. An apparatus as claimed in claim 1 , wherein when coupled together, the first and second integrators serve a first signal processing application and, when electrically decoupled, the first integrator serves a second signal processing application.

7. An apparatus as claimed in claim 1 , wherein the first integrator is coupled to the second integrator by a first cross-over circuit path.

8. An apparatus as claimed in claim 7 , wherein the first cross-over circuit path comprises a first switched-capacitor cross-over circuit.

9. An apparatus as claimed in claim 7 , wherein the first integrator is coupled to the second integrator by a second cross-over circuit path.

10. An apparatus as claimed in claim 9 , wherein the second cross-over circuit path comprises a second switched-capacitor cross-over circuit.

11. An apparatus as claimed in claim 7 , wherein the first cross-over circuit path comprises a first cross-over capacitor.

12. An apparatus as claimed in claim 9 , wherein the second cross-over circuit path comprises a second cross-over capacitor.

13. An apparatus as claimed in claim 11 , wherein the first cross-over capacitor is coupled between a voltage variable element and an amplifier of the first integrator.

14. An apparatus as claimed in claim 11 , further comprising a voltage variable element coupled between the first cross-over capacitor, and an amplifier of the first integrator.

15. An apparatus as claimed in claim 13 , wherein the voltage variable element is controllable so that the first integrator is selectively electrically decouplable from the second integrator.

16. A modulator comprising the analogue-to-digital converter apparatus as claimed in claim 1 .

17. A Sigma-Delta modulator comprising the analogue-to-digital converter apparatus as claimed in claim 1 .

18. A communications apparatus comprising the analogue-to-digital converter apparatus as claimed in claim 1 .

19. A method of reusing an analogue-to-digital converter circuit comprising:

selectively electrically decoupling a first integrator from a second integrator so as to remove a complex pole that exists, when in use, when the first integrator is electrically coupled to the second integrator.

20. An apparatus as claimed in claim 3 , wherein the first integrator is cross-coupled with the second integrator.

Assignments (31)
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 11759915 AND REPLACE IT WITH APPLICATION 11759935 PREVIOUSLY RECORDED ON REEL 040925 FRAME 0001. ASSIGNOR(S) HEREBY CONFIRMS THE RELEASE OF SECURITY INTEREST. Recorded Feb 17, 2020
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: NXP, B.V. F/K/A FREESCALE SEMICONDUCTOR, INC.
Reel/Frame 052917/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 11759915 AND REPLACE IT WITH APPLICATION 11759935 PREVIOUSLY RECORDED ON REEL 040928 FRAME 0001. ASSIGNOR(S) HEREBY CONFIRMS THE RELEASE OF SECURITY INTEREST. Recorded Jan 17, 2020
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: NXP B.V.
Reel/Frame 052915/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 11759915 AND REPLACE IT WITH APPLICATION 11759935 PREVIOUSLY RECORDED ON REEL 037486 FRAME 0517. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT AND ASSUMPTION OF SECURITY INTEREST IN PATENTS. Recorded Dec 10, 2019
From: CITIBANK, N.A.
To: MORGAN STANLEY SENIOR FUNDING, INC.
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CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 12298143 PREVIOUSLY RECORDED ON REEL 042762 FRAME 0145. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT SUPPLEMENT. Recorded Oct 22, 2019
From: NXP B.V.
To: MORGAN STANLEY SENIOR FUNDING, INC.
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CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 12298143 PREVIOUSLY RECORDED ON REEL 038017 FRAME 0058. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT SUPPLEMENT. Recorded Oct 22, 2019
From: NXP B.V.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 051030/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 12298143 PREVIOUSLY RECORDED ON REEL 042985 FRAME 0001. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT SUPPLEMENT. Recorded Oct 22, 2019
From: NXP B.V.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 051029/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 12298143 PREVIOUSLY RECORDED ON REEL 039361 FRAME 0212. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT SUPPLEMENT. Recorded Oct 22, 2019
From: NXP B.V.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 051029/0387 →
RELEASE OF SECURITY INTEREST Recorded Sep 10, 2019
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: NXP B.V.
Reel/Frame 050745/0001 →
RELEASE OF SECURITY INTEREST Recorded Sep 10, 2019
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: NXP B.V.
Reel/Frame 050744/0097 →
CORRECTIVE ASSIGNMENT TO CORRECT THE TO CORRECT THE APPLICATION NO. FROM 13,883,290 TO 13,833,290 PREVIOUSLY RECORDED ON REEL 041703 FRAME 0536. ASSIGNOR(S) HEREBY CONFIRMS THE THE ASSIGNMENT AND ASSUMPTION OF SECURITY INTEREST IN PATENTS.. Recorded Feb 20, 2019
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: SHENZHEN XINGUODU TECHNOLOGY CO., LTD.
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CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 12681366 PREVIOUSLY RECORDED ON REEL 038017 FRAME 0058. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT SUPPLEMENT. Recorded May 9, 2017
From: NXP B.V.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 042985/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 12681366 PREVIOUSLY RECORDED ON REEL 039361 FRAME 0212. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT SUPPLEMENT. Recorded May 9, 2017
From: NXP B.V.
To: MORGAN STANLEY SENIOR FUNDING, INC.
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CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE PATENTS 8108266 AND 8062324 AND REPLACE THEM WITH 6108266 AND 8060324 PREVIOUSLY RECORDED ON REEL 037518 FRAME 0292. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT AND ASSUMPTION OF SECURITY INTEREST IN PATENTS. Recorded Feb 1, 2017
From: CITIBANK, N.A.
To: MORGAN STANLEY SENIOR FUNDING, INC.
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CORRECTIVE ASSIGNMENT TO CORRECT THE NATURE OF CONVEYANCE LISTED CHANGE OF NAME SHOULD BE MERGER AND CHANGE PREVIOUSLY RECORDED AT REEL: 040652 FRAME: 0180. ASSIGNOR(S) HEREBY CONFIRMS THE MERGER AND CHANGE OF NAME. Recorded Jan 12, 2017
From: FREESCALE SEMICONDUCTOR INC.
To: NXP USA, INC.
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CHANGE OF NAME Recorded Nov 8, 2016
From: FREESCALE SEMICONDUCTOR INC.
To: NXP USA, INC.
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RELEASE OF SECURITY INTEREST Recorded Nov 7, 2016
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: NXP B.V.
Reel/Frame 040928/0001 →
RELEASE OF SECURITY INTEREST Recorded Sep 21, 2016
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: NXP, B.V., F/K/A FREESCALE SEMICONDUCTOR, INC.
Reel/Frame 040925/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION 12092129 PREVIOUSLY RECORDED ON REEL 038017 FRAME 0058. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT SUPPLEMENT. Recorded Jul 14, 2016
From: NXP B.V.
To: MORGAN STANLEY SENIOR FUNDING, INC.
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SUPPLEMENT TO THE SECURITY AGREEMENT Recorded Jun 16, 2016
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To: MORGAN STANLEY SENIOR FUNDING, INC.
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SECURITY AGREEMENT SUPPLEMENT Recorded Mar 7, 2016
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ASSIGNMENT AND ASSUMPTION OF SECURITY INTEREST IN PATENTS Recorded Jan 12, 2016
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PATENT RELEASE Recorded Dec 21, 2015
From: CITIBANK, N.A., AS COLLATERAL AGENT
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PATENT RELEASE Recorded Dec 21, 2015
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PATENT RELEASE Recorded Dec 21, 2015
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SECURITY AGREEMENT Recorded Nov 6, 2013
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From: BANNON, ALAN; DUNNE, ANTHONY; MILLER, MATTHEW R.; O'HARE, DANIEL; OLIAEI, OMID
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SECURITY AGREEMENT Recorded May 13, 2010
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SECURITY AGREEMENT Recorded Mar 15, 2010
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SECURITY AGREEMENT Recorded Sep 23, 2009
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To: CITIBANK, N.A.
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