Depending on temperature range, the SiT7910 Super TCXO from SiTime can attain frequency stability of less than 0.1 ppm. Clock oscillator circuits serve two functions. They provide a clock timing signal for digital circuits such as microprocessors and they keep track of time, often for time-stamping of events. While oscillators for digital circuits typically produce […]
Telecommunications
Common mode filter for automotive Ethernet reduces line-to-line capacitance
TDK Corporation has announced the introduction of its new ACT1210E Series (3.2 x 2.5 x 2.5 mm (L x W x H)) of common mode filter for automotive Ethernet 10BASE-T1S. Mass production of this new common-mode filter began in February 2023. This product is the industry’s first common mode filter for automotive Ethernet 10BASE-T1S. Adopting […]
Precision thin-film resistors offer ±0.01% tolerances, ±2ppm TCRs
With the proliferation of electronics in nearly every market sector, there is an increasing need for precision resistors. For markets such as medical instrumentation and control, industrial and automotive controls, communications, and test & measurement, these precision resistors must maintain electrical and environmental stability long term. Stackpole’s RNCF series of precision thin film resistors meet these […]
LEDs optimized for low-current, low-light apps
ROHM Semiconductor announced the availability of the CSL1901 series of 0603-size (0.6-inch × 0.3 inches) / 1608-size (1.6 mm × 0.8 mm) LEDs, optimized for low-light applications for use in indicators and numeric displays in factory automation equipment (i.e., PLCs) and communication control equipment such as modems and routers. In recent years, technological advancements in LED […]
What materials can be used to make miniature antennas?
Many antennas are mechanically simple and electrically complex at the same time. Mechanically an antenna usually has only one or two components, a dielectric layer (which can be the entire antenna) and a conductive layer. This FAQ begins with a brief review of dielectric materials and their importance to antenna performance. It then explores developments […]
Wideband, log periodic, directional antennas handle bandwidths of 600 to 6,000 MHz
Fairview Microwave has expanded its line of wideband, log periodic antennas that operate from 600 to 6,000 MHz for point-to-point wireless communications. Fairview’s new, outdoor-rated, directional antennas function as boosters where the existing cellular signal is weak and needs to reach longer distances. This makes them ideal for strengthening 5G, 4G, LTE, CMDA, LoRA, IoT, and Wi-Fi signals. […]
Multilayer chip antenna covers 700-960 MHz, 1,710-2,690 MHz ranges
Würth Elektronik is now launching an additional multilayer chip antenna for the miniaturization of radio applications. Measuring just 40 x 6 x 5 mm, the WE-MCA antenna (7488918022) covers the 700 to 960 MHz and 1710 to 2690 MHz frequency ranges. With its hitherto unachieved form factor and slender profile, the antenna offers an excellent size-to-performance ratio. […]
Oven-controlled Xtal oscillators sync to 1 pps input, output
IQD launched the IQCM-200, a disciplined OCXO, incorporating sync to a 1 PPS (pulse per second) input as well as a 1 PPS output. The IQCM-200 is part of a series of disciplined OCXOs available from IQD. This particular model is the smallest sized OCXO capable of achieving a holdover capability of 1.5µs over 24 […]
What’s the difference between equalizers?
Equalizers are used to alter the performance of signal chains. In some cases, that means linearizing signal chain performance. In other cases, equalizers are used to introduce nonlinearities. As a result, equalizer designs vary widely from simple passive circuits to complex multi-stage designs and active circuits. This FAQ reviews equalizer basics, looks at equalizers for […]
What’s a logarithmic resistor ladder good for?
A logarithmic resistor ladder consists of a resistor string and switches designed to attenuate a signal. The state of the switches can be considered to represent a digital code proportional to the logarithm of the attenuation ratio. Logarithmic attenuation is useful when a large dynamic range is needed. Audio volume control and fading/balancing audio signals […]
