IP Library › Granted Patent US 7,692,464
Granted Patent B2
US 7,692,464 · App. 12/050,172 · Granted Apr 6, 2010

Pulse width modulation wave output circuit

Assignee: Freescale Semiconductor, Inc.
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Quick Facts
Patent No.
US 7,692,464
App. No.
12/050,172
Granted
Apr 6, 2010
Kind
B2
Abstract

A pulse width modulation (PWM) wave output circuit that efficiently and accurately outputs dual PWM waves includes two comparators, an OR circuit, and an AND circuit. A voltage generator supplies the comparators with ramp voltages having the same wave height and shifted phases. The comparator compares the ramp voltages with the reference voltage and provides the comparison results to the OR circuit and the AND circuit. The OR circuit outputs a first modulation wave, and the AND circuit generates a second modulation wave. Accordingly, modulation waves having different duties are output based on ramp voltage having different phases.

Claims (7)

1. A pulse width modulation wave output circuit comprising:

a first voltage comparison means for receiving a first ramp voltage at a negative input terminal of the first voltage comparison means;

a second voltage comparison means for receiving a second ramp voltage at a negative input terminal of the second voltage comparison means, the second ramp voltage having a phase shifted from that of the first ramp voltage;

wherein the first and second voltage comparison means receive a reference voltage at positive input terminals thereof and perform comparison with the reference voltage to output first and second comparison signals used to generate first and second pulse width modulation signals;

an OR gate that receives the first and second comparison signals and generates the first pulse width modulation signal; and

an AND gate that receives the first and second comparison signals and generates the second pulse width modulation signal, wherein the first and second pulse width modulation signals have different ON/OFF duty cycles.

2. The pulse width modulation wave output circuit according to claim 1 , wherein the first and second ramp voltages have sawtooth waveforms.

Assignments (30)
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 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 →
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 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 →
RELEASE OF SECURITY INTEREST Recorded Sep 10, 2019
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: NXP B.V.
Reel/Frame 050744/0097 →
RELEASE OF SECURITY INTEREST Recorded Sep 10, 2019
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: NXP B.V.
Reel/Frame 050745/0001 →
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.
Reel/Frame 048734/0001 →
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.
Reel/Frame 042762/0145 →
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 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.
Reel/Frame 041703/0536 →
MERGER Recorded Jan 3, 2017
From: FREESCALE SEMICONDUCTOR, INC.
To: NXP USA, INC.
Reel/Frame 041144/0363 →
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.
Reel/Frame 038017/0058 →
ASSIGNMENT AND ASSUMPTION OF SECURITY INTEREST IN PATENTS Recorded Jan 13, 2016
From: CITIBANK, N.A.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 037518/0292 →
ASSIGNMENT AND ASSUMPTION OF SECURITY INTEREST IN PATENTS Recorded Jan 12, 2016
From: CITIBANK, N.A.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 037486/0517 →
PATENT RELEASE Recorded Dec 21, 2015
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: FREESCALE SEMICONDUCTOR, INC.
Reel/Frame 037356/0553 →
PATENT RELEASE Recorded Dec 21, 2015
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: FREESCALE SEMICONDUCTOR, INC.
Reel/Frame 037354/0688 →
PATENT RELEASE Recorded Dec 21, 2015
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: FREESCALE SEMICONDUCTOR, INC.
Reel/Frame 037356/0143 →
SECURITY AGREEMENT Recorded Nov 6, 2013
From: FREESCALE SEMICONDUCTOR, INC.
To: CITIBANK, N.A., AS NOTES COLLATERAL AGENT
Reel/Frame 031591/0266 →
SECURITY AGREEMENT Recorded Jun 18, 2013
From: FREESCALE SEMICONDUCTOR, INC.
To: CITIBANK, N.A., AS NOTES COLLATERAL AGENT
Reel/Frame 030633/0424 →
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.
Reel/Frame 024085/0001 →
SECURITY AGREEMENT Recorded Jul 7, 2008
From: FREESCALE SEMICONDUCTOR, INC.
To: CITIBANK, N.A.
Reel/Frame 021194/0593 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 18, 2008
From: MURAKAMI, SHINTAROH; EGAWA, KANJI
To: FREESCALE SEMICONDUCTOR, INC.
Reel/Frame 020663/0014 →
Priority Claims (1)
JP 2007-97406 · Apr 3, 2007 · national
Continuity (1)
Related Publication 20080246523A1 · Oct 9, 2008