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Ebenezer Dwobeng
Feb 13, 2017
Digital signal processing in RF sampling DACs
In this blog post, I will discuss the important digital signal processing (DSP) blocks that create all of the magic in direct RF sampling DACs. These blocks include interpolation filters, mixers, numerically controlled oscillators (NCOs), summers and inverse sinc filters. What makes RF sampling devices magical is that they combine digital interpolation...
Satish Uppathil
Feb 9, 2017
RF sampling: Learning more about Latency
In this post, I’m going to discuss latency in an analog-to-digital converter (ADC). Latency is the time it takes for a signal to travel from point A to point B. In an ADC, latency is how long it takes from the time that an analog input is applied to the time that the digital output word becomes available. Why is latency important? Regardless...
Guilherme Borba
Jan 26, 2017
Solve the challenge of too many wires in high-speed networking equipment
Top-of-rack (ToR) switches, routers, servers and storage, types of today’s high-speed communications equipment , are among the most sleek, powerful and meticulously designed workhorses of the data center. They contain impressive circuitry, pushing +25Gbps with scores of ports, complex switch application-specific integrated circuits (ASICs) and...
Luke LaPointe
Jan 17, 2017
Inductive sensing: reliably detect faults in circuit breakers using contactless inductive switches
In my last blog post , I discussed how to use inductive switches for proximity applications. In this post, I want to discuss how to use inductive switches in slide switch applications to make circuit breakers more reliable. Circuit breakers typically ...
Abhi Aarey
Jan 12, 2017
Explore the non-speed-related benefits of CAN FD
Most discussions about Controller Area Network with Flexible Data-Rate (CAN FD) invariably revolve around its most distinctive feature – increased speed. Naturally, this leads to the assumption that if you don’t need the speed, then you don’t need FD. But that is not always true! Join me as I take a look at a couple of the lesser-known...
Brian Wang
Jan 10, 2017
Don’t let bad reference signals destroy the phase noise in your PLL/synthesizer
“You are what you eat” is a commonly heard saying that recommends the careful selection of food, given its ability to directly affect our health and well-being. Although not an exact comparison, the concept applies if you think of your input reference signal as the food, ingested by the phase-locked loop (PLL)/synthesizer, which affects...
Xiong Li
Dec 29, 2016
Six easy steps to select the right digital isolator for solar-inverter applications
With the solar inverter market growing at a fast rate based on data from International Energy Agency (IEA), it is imperative that designers be able to design their systems faster to meet the market’s needs. But the high voltages of these types of systems require additional care in component selection and system design to develop equipment that...
Chris Glaser
Dec 22, 2016
Do you always need a LDO in front of your data converter?
Figure 1: SNR of the ADS5407 powered by LDOs or DC/DCs Can you tell the difference in the signal-to-noise (SNR) ratio shown in Figure 1? Neither can the ADS5407 12-bit analog-to-digital converter (ADC). Both the low-dropout (LDO) linear regulators and the step-down (buck) DC/DC converters give the same data converter noise performance. How is noise...
Luke LaPointe
Dec 13, 2016
Inductive sensing: make your proximity-switch applications as easy as 1, 2, 3 with WEBENCH
When customers are designing proximity-switch applications using inductive sensing devices like the LDC0851 switch, they often ask me how to design a coil for a given switching distance. Today, I want to show you how to use TI’s new WEBENCH®...
Xiyao Zhang
Dec 8, 2016
What you need to know about input bias current – and why
One of my standard interview questions for new college graduates is to describe the non-ideal aspects of an operational amplifier (op amp ). While most candidates start with open-loop gain, offset voltage, bandwidth and noise, only a few mention input bias current. Even experienced circuit designers often have questions about input bias current and...
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