This week, 21 Semiconductors & Semiconductor Equipment stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

NXP Semiconductors NV’s (NXPI) ratings are looking better this week, moving up to a B from last week’s C. NXP Semiconductors NV provides mixed signal and standard product solutions for radio frequency (RF), analog, power management, interface, security, and digital processing products worldwide. The company also gets A’s in sales growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of NXPI stock.

QUALCOMM Incorporated (QCOM) earns a A this week, jumping up from last week’s grade of B. QUALCOMM Incorporated manufactures digital wireless communications equipment. The company also gets A’s in earnings growth and return on equity. For more information, get Portfolio Grader’s complete analysis of QCOM stock.

This is a strong week for Cirrus Logic, Inc. (CRUS). The company’s rating climbs to A from the previous week’s B. Cirrus Logic, Inc. is a developer of high-precision, analog, and mixed-signal integrated circuits (ICs) for the audio and energy markets. The company also gets A’s in sales growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of CRUS stock.

Xilinx, Inc. (XLNX) shows solid improvement this week. The company’s rating rises from a C to a B. Xilinx, Inc. designs, develops and markets programmable platforms and predefined system functions delivered as intellectual property cores. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of XLNX stock.

The rating of Microsemi Corporation (MSCC) moves up this week, rising from a C to a B. Microsemi Corporation designs, manufactures, and markets high-performance analog and mixed-signal integrated circuits and high-reliability semiconductors. The company also gets A’s in sales growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of MSCC stock.

MACOM Technology Solutions Holdings, Inc. (MTSI) is seeing ratings go up from a C last week to a B this week. MACOM Technology Solutions Holdings, Inc. designs, develops, manufactures, and markets semiconductors and modules for use in wireless and wireline applications across the radio frequency, microwave, and millimeterwave spectrum. The company also gets A’s in sales growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of MTSI stock.

This week, Tessera Technologies, Inc.’s (TSRA) ratings are up from a C last week to a B. Tessera Technologies, Inc. invests in, licenses and delivers miniaturization technologies for electronic devices. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of TSRA stock.

This week, Veeco Instruments Inc. (VECO) pushes up from a C to a B rating. Veeco Instruments Inc. manufactures equipment for light emitting diodes and solar panels. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of VECO stock.

Daqo New Energy Corp. Sponsored ADR (DQ) improves from a B to a A rating this week. Daqo New Energy Corp. Sponsored ADR manufactures polysilicon. The company also gets A’s in sales growth, operating margin growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of DQ stock.

Teradyne, Inc. (TER) boosts its rating from a C to a B this week. Teradyne, Inc. is a designer, manufacturer and global supplier of automatic systems and solutions used to test complex electronics. The company also gets A’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of TER stock.

PDF Solutions, Inc. (PDFS) gets a higher grade this week, advancing from a B last week to a A. PDF Solutions, Inc. provides infrastructure technologies and services to optimize performance and improve yield of manufactured integrated circuits. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of PDFS stock.

Brooks Automation, Inc. (BRKS) boosts its rating from a C to a B this week. Brooks Automation, Inc. provides automation, vacuum, and instrumentation solutions to original equipment manufacturers and users throughout the world. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of BRKS stock.

This week, Marvell Technology Group Ltd.’s (MRVL) ratings are up from a B last week to a A. Marvell Technology Group Ltd. designs, develops, and markets integrated circuits for communications-related markets. The company also gets A’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of MRVL stock.

This is a strong week for Rambus Inc. (RMBS). The company’s rating climbs to B from the previous week’s C. Rambus Inc. is a technology licensing company and focuses on the design, development and licensing of chip interface technologies and architectures that are foundational to nearly all digital electronics products. The company also gets A’s in operating margin growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of RMBS stock.

Axcelis Technologies, Inc. (ACLS) is seeing ratings go up from a C last week to a B this week. Axcelis Technologies, Inc. designs, manufactures and services ion implantation, dry strip and other processing equipment used in the fabrication of semiconductor chips in the United States, Europe and Asia. The company also gets A’s in operating margin growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of ACLS stock.

The rating of DSP Group, Inc. (DSPG) moves up this week, rising from a C to a B. DSP Group, Inc. provides wireless chipset solutions for converged communications at home. The company also gets A’s in earnings growth, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of DSPG stock.

STMicroelectronics NV ADR RegS (STM) earns a B this week, jumping up from last week’s grade of C. STMicroelectronics NV ADR RegS is a designer, developer, manufacturer and marketer of semiconductor products. The company also gets A’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of STM stock.

Semiconductor Manufacturing International Corp. Sponsored ADR’s (SMI) ratings are looking better this week, moving up to a A from last week’s B. Semiconductor Manufacturing International Corp. Sponsored ADR manufactures, trades, packages, tests, and provides computer-aided design integrated circuits. The company also gets A’s in sales growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SMI stock.

This week, Pixelworks, Inc. (PXLW) pushes up from a D to a B rating. Pixelworks, Inc. designs and develops system-on-a-chip solutions. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of PXLW stock.

O2Micro International Limited Sponsored ADR (OIIM) gets a higher grade this week, advancing from a C last week to a B. O2Micro International Limited Sponsored ADR designs, develops, and markets integrated circuits for power management and computer security applications. The company also gets A’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of OIIM stock.

Sequans Communications SA Sponsored ADR (SQNS) shows solid improvement this week. The company’s rating rises from a C to a B. Sequans Communications SA Sponsored ADR is a fabless designer, developer and supplier of 4G semiconductor solutions for wireless broadband applications. The company also gets A’s in sales growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SQNS stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.