IP Library › Granted Patent US 8,085,954
Granted Patent B2
US 8,085,954 · App. 11/996,244 · Granted Dec 27, 2011

Microphone amplification arrangement and integrated circuit therefor

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Quick Facts
Patent No.
US 8,085,954
App. No.
11/996,244
Granted
Dec 27, 2011
Kind
B2
Abstract

A microphone amplifier arrangement comprises at least one microphone input connected to a dual output microphone pre-amplifier having an input resistance comprising a first resistance and a second resistance in a first voltage-to-voltage mode of operation, and only the second resistance in a second current-to-voltage mode of operation. A first output is operably coupled to a first feedback path comprising a V 2 V feedback resistor; and a second output is operably coupled to a second feedback path comprising an I 2 V feedback resistor. In this manner, the microphone amplifier arrangement is arranged to support both a V 2 V microphone amplifier and a low-noise I 2 V microphone amplifier.

Claims (23)

1. A microphone amplifier arrangement comprising:

at least one microphone input connected to a dual output microphone pre-amplifier having an input resistance comprising a first resistance and a second resistance in a first voltage-to-voltage mode of operation, and only the second resistance in a second current-to-voltage mode of operation;

a first output is operably coupled to a first feedback path comprising a voltage-to-voltage feedback resistor; and

a second output is operably coupled to a second feedback path comprising a current-to-voltage feedback resistor, arranged to support both a voltage-to-voltage microphone amplifier and a current-to-voltage microphone amplifier.

2. A microphone amplifier arrangement according to claim 1 further comprising a controller operably coupled to the dual output microphone pre-amplifier and arranged to switch an operation of the dual output microphone pre-amplifier between a voltage-to-voltage mode and a current-to-voltage mode of operation.

3. A microphone amplifier arrangement according to claim 2 wherein the controller switches the dual output microphone pre-amplifier to operate in a low noise mode using the second feedback path.

4. A microphone amplifier arrangement according to claim 3 wherein the controller short circuits the first resistance to operate in a current-to-voltage mode of operation.

5. A microphone amplifier arrangement according to claim 3 , wherein two or more dual output microphone pre-amplifiers are connected to the controller in parallel, such that either, or any, of the dual output microphone pre-amplifiers are operable as a voltage-to-voltage or current-to-voltage microphone amplifier.

6. A microphone amplifier arrangement according to claim 3 , wherein the outputs of the dual output microphone pre-amplifier being operably coupled to a combined programmable gain amplifier and analogue multiplexer arrangement.

7. An integrated circuit characterised by the microphone amplification system according to claim 3 .

8. A microphone amplifier arrangement according to claim 2 wherein the controller short circuits the first resistance to operate in the current-to-voltage mode of operation.

9. A microphone amplifier arrangement according to claim 8 , wherein two or more dual output microphone pre-amplifiers are connected to the controller in parallel, such that either, or any, of the dual output microphone pre-amplifiers are operable as a voltage-to-voltage or current-to-voltage microphone amplifier.

10. A microphone amplifier arrangement according to claim 8 , wherein the outputs of the dual output microphone pre-amplifier being operably coupled to a combined programmable gain amplifier and analogue multiplexer arrangement.

11. An integrated circuit characterised by the microphone amplification system according to claim 8 .

12. A microphone amplifier arrangement according to claim 2 , wherein two or more dual output microphone pre-amplifiers are connected to the controller in parallel, such that either, or any, of the dual output microphone pre-amplifiers are operable as a voltage-to-voltage or current-to-voltage microphone amplifier.

13. An integrated circuit characterised by the microphone amplification system according to claim 12 .

14. A microphone amplifier arrangement according to claim 2 , wherein the outputs of the dual output microphone pre-amplifier being operably coupled to a combined programmable gain amplifier and analogue multiplexer arrangement.

15. A microphone amplifier arrangement according to claim 14 wherein the combined programmable gain amplifier and analogue multiplexer arrangement is operably coupled to the controller that is arranged to select an output of the dual output microphone pre-amplifier to further amplify and transmit.

16. A microphone amplifier arrangement according to claim 15 wherein the combined programmable gain amplifier and analogue multiplexer arrangement is operably coupled to a single-to-differential amplifier arrangement.

17. A microphone amplifier arrangement according to claim 14 wherein the combined programmable gain amplifier and analogue multiplexer arrangement is operably coupled to a single-to-differential amplifier arrangement.

18. An integrated circuit characterised by the microphone amplification system according to claim 14 .

19. An integrated circuit characterised by the microphone amplification system according to claim 2 .

20. An integrated circuit characterised by the microphone amplification system according to claim 1 .

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.
Reel/Frame 053547/0421 →
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.
Reel/Frame 051145/0184 →
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.
Reel/Frame 040652/0180 →
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.
Reel/Frame 039361/0212 →
SUPPLEMENT TO THE SECURITY AGREEMENT Recorded Jun 16, 2016
From: FREESCALE SEMICONDUCTOR, INC.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 039138/0001 →
SECURITY AGREEMENT SUPPLEMENT Recorded Mar 7, 2016
From: NXP B.V.
To: MORGAN STANLEY SENIOR FUNDING, INC.
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ASSIGNMENT AND ASSUMPTION OF SECURITY INTEREST IN PATENTS Recorded Jan 13, 2016
From: CITIBANK, N.A.
To: MORGAN STANLEY SENIOR FUNDING, INC.
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ASSIGNMENT AND ASSUMPTION OF SECURITY INTEREST IN PATENTS Recorded Jan 12, 2016
From: CITIBANK, N.A.
To: MORGAN STANLEY SENIOR FUNDING, INC.
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PATENT RELEASE Recorded Dec 21, 2015
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: FREESCALE SEMICONDUCTOR, INC.
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PATENT RELEASE Recorded Dec 21, 2015
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: FREESCALE SEMICONDUCTOR, INC.
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PATENT RELEASE Recorded Dec 21, 2015
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: FREESCALE SEMICONDUCTOR, INC.
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SECURITY AGREEMENT Recorded Nov 6, 2013
From: FREESCALE SEMICONDUCTOR, INC.
To: CITIBANK, N.A., AS NOTES COLLATERAL AGENT
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SECURITY AGREEMENT Recorded Jun 18, 2013
From: FREESCALE SEMICONDUCTOR, INC.
To: CITIBANK, N.A., AS NOTES COLLATERAL AGENT
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SECURITY AGREEMENT Recorded May 13, 2010
From: FREESCALE SEMICONDUCTOR, INC.
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 024397/0001 →
SECURITY AGREEMENT Recorded Mar 15, 2010
From: FREESCALE SEMICONDUCTOR, INC.
To: CITIBANK, N.A.
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SECURITY AGREEMENT Recorded Jul 7, 2008
From: FREESCALE SEMICONDUCTOR, INC.
To: CITIBANK, N.A.
Reel/Frame 021194/0593 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 21, 2008
From: ODDOART, LUDOVIC; ENJALBERT, JEROME
To: FREESCALE SEMICONDUCTOR, INC.
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