- Q-Cells AG photovoltaics, Multicrystalline Silicon
- Q-Dot. Inc
• acquired by Simtek
• now Cypress Semiconductor Corp.
- Q-Labs [Qualified Parts Laboratory] obsolete products, microcontrollers, linear and communications devices
- Qasara communications
- QCT [Qualcomm CDMA Technologies] wireless technology
- QED [Quantum Effect Devices] processors
• acquired by PMC-Sierra
• PMC-Sierra acquired by Microsemi Corp.
• Microsemi Corporation acquired by Microchip Technology Inc.
- QEDI [Quantum Electronic Design & Innovation]
- Qimonda AG memories
- QinetiQ Group PLC defence and security technology-based services and solutions, RFIDs, ACFs
- QINGCHUN SEMICONDUCTOR (NINGBO) CO., LTD.
- Qingdao Eastsoft Communication Technology Co., Ltd. [Eastsoft] powerline communications
- QLogic Corp. networking
• InfiniBand Business Line acquired by Intel Corporation
• QLogic acquired by Cavium Networks Inc.
- QMT [Quantum Motion Technologies] fault tolerant quantum processors
- Qorvo Inc. RF building blocks
- QP Semiconductor DSCC certified standard products
- QPL Ltd.
- QPT Limited Gallium Nitride (GaN) transistors
- QSound Labs audio
- Qspeed Semiconductor rectifiers
• acquired by Power Intergration Inc.
- QST Corporation Limited MEMS, sensors
- QT Optoelectronics [Quality Tech] LED, optocouplers
• acquired by Fairchild
• Fairchild Semiconductor International Inc. acquired by ON Semiconductor
• LED and LED display product lines acquired by Everlight Electronic Co., Ltd.
- Quadic Systems [QSI] analog
• acquired by Tundra Semiconductors
- quadric.io, Inc. processors, edge processing units (EPUs)
- Qualcomm Inc. wireless communications
- Qualified Parts Laboratory [Q-Labs] obsolete products, microcontrollers, linear and communications devices
- Qualinx B.V. GNSS radio chips
- Quality Semiconductor FCT logic, analog & bus switches, FIFO, dual-port RAM, network ICs, clock management
• acquired by Integrated Device Technology [IDT]
• IDT [Integrated Device Technology, Inc.] acquired by Renesas Technology Corp.
- Quality Tech [QT Optoelectronics] LED, optocouplers
• acquired by Fairchild
• Fairchild Semiconductor International Inc. acquired by ON Semiconductor
• LED and LED display product lines acquired by Everlight Electronic Co., Ltd.
- Qualtre Inc. [Qualtré] MEMS-based motion sensors
- Quanergy Systems, Inc. LiDAR sensors
- QuantalRF™ RF semiconductors
- Quantance Inc. wireless communications
- QuantaSol Limited solar cells, photovoltaics
- Quantenna Communications Inc. wireless networking
- Quantum Effect Devices [QED] processors
• acquired by PMC-Sierra
• PMC-Sierra acquired by Microsemi Corp.
• Microsemi Corporation acquired by Microchip Technology Inc.
- Quantum Electronic Design & Innovation [QEDI]
- Quantum Motion Technologies [QMT] fault tolerant quantum processors
- Quantum Research Group Ltd. sensing
• acquired by Atmel
• Atmel acquired by Microchip Technology Inc.
- Quantum Technology Super Sensors Ltd sensors
- Quanxin Electronic Technology (Shenzhen) Co., Ltd. [QX Micro Devices Co., Ltd. ] RF ICs
- Quectel Wireless Solutions Co., Ltd. GSM/GPRS, UMTS/HSPA/LTE, GNSS modules
- Quellan Inc. noise-cancelling IC's
• acquired by Intersil Corp.
- Quickfilter Technologies audio signal processing
- QuickLogic CSSPs, FPGA
- QuInAs Technology Limited non-volatile floating-gate memories
• please check UltraRAM™ too!
- Quintic Microelectronics Co., Ltd. wireless communications
• acquired by NXP Semiconductors
- Quix Quantum BV quantum processors
- Quixant plc displays
- Quora Technology Inc. wide bandgap (WBG) semiconductor materials
- Quorum Systems Cellular Transceivers
• acquired by Spreadtrum Communications (Shanghai) Co., Ltd.
• Spreadtrum, a subsidiary of Tsinghua Unigroup called UNISOC TECHNOLOGIES INC.
- Qusion Technologies Inc. optical devices
- QX Micro Devices Co., Ltd. [Quanxin Electronic Technology (Shenzhen) Co., Ltd. ] RF ICs
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