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What are VCOs?
Voltage controlled oscillators (VCOs) can be tuned over a wide range of frequencies by applying a voltage (tuning voltage) to it. This type of oscillator is less costly than crystal oscillators, but not as stable.
total search288 articles
2004-03-25 Zarlink develops front-end subsystem for STBs
Zarlink Semiconductor has introduced a production-ready blueprint for a complete front-end subsystem used in digital satellite STBs.
2007-05-24 Wireless transceiver rolls for 915MHz ISM-band
Infineon Technologies AG has unveiled the new member of its TDA525x transceiver family designed for use in the 915MHz ISM-band.
2007-04-24 WiMAX transceiver minimizes component count
All of Atmel's MAX-Link WiMAX transceivers promise excellent RF performance with low current consumption, low cost and only a minimum of external components for the RF design.
2007-06-18 WiMAX RF transceiver cuts chip count, board space
Maxim Integrated Products introduced the MAX2837, a single-chip WiMAX RF transceiver in high-volume production.
2015-08-13 Weak mobile infrastructure opens opportunities for RF chips
The report from Mobile Experts, which analyses transceivers for bandwidth, power level and other factors, couldn't have picked a better time just as the market seems to slow down.
2008-09-10 VHF/UHF transmitter delivers up to 100Kbit/s
Maxim Integrated Products introduces the MAX7057 crystal-referenced, phased-locked loop VHF/UHF transmitter for transmitting OOK/ASK/FSK data over a wide range of frequencies.
2008-09-16 Valuing substrate parasitics in RFIC designs
Often, there is a need to simulate RFIC designs with substrate parasitics to accurately represent high-frequency effects in actual silicon. Generally, parasitics appear from a chip's surface layers, especially from metallization routing and coupling, or from the RC parasitics of the silicon substrate.
2007-12-04 Universal GPS, Galileo RFIC comes in tested die
Maxim Integrated Products has introduced the MAX2769E/W, claimed to be the industry's first universal GNSS receiver for GPS, WAAS, Egnos, Galileo and Glonass navigation satellite systems in a single tested die.
2006-02-23 UMC claims silicon frequency record of 192GHz
United Microelectronics has fabricated a "push-push" voltage-controlled oscillator that it claims has the highest operating frequency for any circuit implemented in silicon to date: 192GHz.
2010-06-21 Ultrasmall front-end module targets GPRS handsets
Skyworks Solutions Inc. claims the most cost-effective CMOS front-end module GPRS handsets.
2007-12-11 UHF receiver/transmitter line targets industrial apps
Atmel announced its ATA8x0x UHF ASK/FSK receiver/transmitter family targeted at remote controls for consumer and industrial systems, access control, alarm and telemetry systems, energy metering and home automation as well as active RFID tagging systems.
2007-09-17 UHF ASK/FSK receiver ICs suit RKE, TPMS apps
Atmel extended its portfolio of automotive RF devices with the release of three new UHF ASK/FSK receiver ICs, claimed to offer the best compromise between high integration, outstanding performance, and worldwide frequency coverage.
2008-04-15 Tx/Rx chips support 3Gbit/s for SDI apps
Gennum has developed what it says is the industry's first single-chip transmit and receive products to support 3Gbit/s, as well as HD and SD, for SDI applications.
2005-09-27 TVs benefit from low-power tuner
Zarlink Semiconductor introduced the ZL0037 satellite tuner for SD (standard definition) and HD (high definition) digital satellite television receivers used in PayTV systems.
2008-06-03 Transmitter handles two frequencies with one crystal
Maxim Integrated Products has introduced the MAX7058 crystal-referenced, phased-locked loop VHF/UHF transmitter for transmitting OOK/ASK/FSK data at 315MHz or 390MHz.
2005-04-28 Transceivers suit space-sensitive apps
Maxim introduces the MAX7030/MAX7031/MAX7032 family of crystal-referenced VHF/UHF transceivers, which delivers more than 10dBm output power and -114dBm (MAX7030/MAX7032 in ASK mode)/-110dBm (MAX7031/MAX7030 in FSK mode) sensitivity.
2007-10-16 Transceiver delivers CDMA2000 to handsets
GCT Semiconductor has launched a highly integrated RF transceiver for CDMA2000 applications, which is designed for the 800MHz cellular band operation.
2003-12-09 Toshiba module supports air data rates of up to 1Mbps
Toshiba America Electronic Components Inc. has announced the addition of a 2.4GHz RF transceiver module that can be used as an embedded reference design for the TB32301AFL radio transceiver.
2010-10-14 Tiny varactor diodes boast low resistance, high capacitance change
Skyworks unveils miniature varactor diodes for wide range of applications
2011-02-15 TI Tx/Rx processors tip DPD tech base stations
Texas Instruments's GC533x family of transmit/receive processors features two turn-key processors that provide a flexible digital transmit and receive solution for wide-bandwidth and multiantenna wireless base stations at a fraction of the cost of high-gate-count FPGAs.
2008-07-14 TI rolls 16bit single-channel ADC, low-jitter clock
Texas Instruments Inc. has introduced a 16bit, single-channel, 135MSps ADC and a low-jitter clock synthesizer.
2002-10-28 TI RF transceiver transmits 64kbps to >200m distances
The TRF6901 RF transceiver from Texas Instruments is designed for FSK or OOK transceiver applications in PDAs, remote sensors, and security systems.
2011-12-21 Synthesizer touts -226dBc/Hz in-band phase noise
The LTC6945 comprises a reference buffer, a reference divider, phase-frequency detector with phase-locked indicator and an ultralow noise programmable charge pump.
2009-07-09 Synthesizer provides
National Semiconductor Corp. has announced what it claims is the industry's lowest-noise, fully integrated frequency synthesizer, the PowerWise LMX2541.
2004-09-02 Startup Berkna builds all-CMOS GSM transceiver
Berkna believes its new all-CMOS single-chip transceiver will address the power, performance, space, cost and multimode flexibility requirements of GSM handsets.
2004-07-01 Speedy A/Ds demand stable clocks
Understanding the factors that affect converter accuracy will establish just how good a reference clock must be.
2004-07-01 SONET CMOS transceiver hits 10Gbps
Xignal develops a single-chip full-rate 4:1 Serdes chip consuming <1W in a standard 0.13?m CMOS technology.
2008-07-04 Silicon TV tuners speed past the CAN
Until the most recent product announcements, silicon tuners have fallen well short of the performance offered by hand-tuned CAN tuners. But one company in particular seems to have focused on achieving the best possible silicon solutions for fixed TV tuners: XCeive Inc.
2004-06-11 Silicon Labs rolls integrated transceiver
Silicon Labs started sampling a single-chip transceiver, the Aero II, that executives said reduces the BoMs required for quad-band GSM cellular handsets.
2002-08-30 Silicon Labs GSM transceiver integrates DCXO
The Aero+ GSM/GPRS transceiver integrates a digitally-controlled crystal oscillator and eliminates the need for a VC-TCXO in mobile phones.
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