Texas Instruments (TI) (NASDAQ: TXN) introduced a new family of clock generators that provides ultra-low jitter of 100 femtoseconds (fs) and flexible, unique pin control options. Compared to conventional reference clock solutions, the new clock generators’ jitter performance enables system designers to optimize system timing margins and bit error rate (BER) to reduce data transmission […]
Clocks & Timing
Application relevance of clock jitter
Clock Jitter is commonly used to describe the performance requirements of oscillators and PLLs when driving high performance components like FPGAs, Microprocessors, and PHYs. But the plethora of clock jitter types, measurement methodologies, and corresponding specifications is broad and often leads to confusion. It is important to use the jitter type that is most appropriate […]
Clock jitter attenuator optimizes serial interface functionality in base station designs
Analog Devices introduced a high-performance clock jitter attenuator designed to support the JESD204B serial interface standard for connecting high-speed data converters and field-programmable gate arrays (FPGAs) operating in base station designs. The JESD204B interface was specifically developed to address high-data rate system design needs, and the 3.2-GHz HMC7044 clock jitter attenuator contains functions that support […]
Top 10 analog threads on EDAboard.com – August
Crystal load capacitance – In the book, Experimental Methods in RF Design”, the authors state that “Our crystal had marked frequency of 7045 KHz. This was the specified frequency for operation with a 32-pF load capacitance.” If I had a 20MHz crystal, how will I know the exact value of its load capacitance? Read more […]
Miniature OCXO measures 9.7 x 7.5. mm
IQD’s latest Oven Controlled Crystal Oscillator (OCXO), the IQOV-71 series, is housed in 4-pad plastic package with a fibre glass base measuring only 9.7 x 7.5mm. Despite the ultra-small size, the new model offers very low frequency stabilities down to ±10ppb over an operating temperature range of -20 to 70 degrees C or ±20ppb over […]
Low-power RF synthesizer enhances radio sensitivity and dynamic range
Texas Instruments LMX2571 low-power wideband radio frequency (RF) synthesizer covers up to 1.34 GHz, and integrates an ultra-low-noise PLLatinum fractional-N phase-locked loop (PLL) with a multicore voltage-controlled oscillator (VCO), enabling low phase noise and spurs at 39 mA (128 mW). The device enhances radio sensitivity and dynamic range for applications such as low-power wireless communication, handheld oscilloscopes and signal […]
Low-jitter 1.25-GSPS clock optimizes JESD204B serial interface functionality in GSPS data converter applications
New clock IC enables the unique functionality of the JESD204B SERDES high-speed interface Norwood, MA (12/02/2014) – AD9528 provides a low-power, multi-output, clock distribution function with low-jitter performance, along with an on-chip, two-stage PLL and VCO. The on-chip VCO tunes from 3.6 GHz to 4.0 GHz, with the input receivers and oscillator providing both single-ended […]
Choosing, using and designing oscillators
Most electronics today have oscillators in them. Digital circuitry needs a clock. Radio frequency signals require an oscillator or clock. Some analog circuitry also needs a clock or oscillating signal source. If you are using a microcontroller then it might have a built-in clock, although it may not be accurate enough, depending on your application, […]
How to Select the Proper Quartz Crystal to Meet Your Design’s Timing Budget
by IDT There are five timing budget parameters which influence the total system timing error of a quartz crystal and oscillator combination: frequency tolerance, frequency stability, aging, load capacitance; and oscillator accuracy. In this post, we will discuss the basic guidelines in selecting the proper quartz crystal to meet a design’s timing budget. Frequency Tolerance Also […]
IDT extends PCIe timing leadership with 1.5V extensions
Integrated Device Technology, Inc. (IDT®) (NASDAQ: IDTI) announced it has expanded its leading system-on-chip (SoC)-friendly PCI Express® (PCIe®) timing family with the addition of 1.5 V clock generators and clock multiplexers. The new devices join the previously introduced 1.5 V buffers to provide enterprise-level performance for space- and power-constrained designs. The chips offer up to […]
