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INTRODUCTION
The RHFOSC04 is a driver and divider for crystal oscillators. It comprises a stage ripple-carry binary counter and an oscillator portion. Crystal oscillator circuits can be implemented in the oscillator section.
The complicated, high reliability specifications for frequency references in the aerospace, defence, and avionics applications are met or exceeded by Microsemi’s cesium, rubidium, and quartz oscillators.
These devices are perfect for important aerospace applications in hostile conditions, whether airborne, maritime, ground-based, or in space, due to their small size, low power consumption, quick warm-up capabilities, exceptional stability, and spectrum purity.
Rad-hard crystal stabilised clock sources with tolerance to at least ionising radiation are required. A typical method has been to spot-shield or vault a commercially available component.
Main electronics boards (MEBs) and readout electronics that must function in risky space conditions require rad-hard clock sources. The readout circuits must be installed alongside the sensors in remote sensing and telemetry applications, which can be placed at any distance from the data processing electronics.
The readout can produce its own clock signals and send the resulting data to a distant receiver when there is a locally generated clock signal.
If a carrier signal with crystal stabilisation was available, the readout might generate a clock signal that is an integral submultiple of the carrier and then modulate the carrier using the data from the clock signal. The radiation hardened by design (RHBD) CMOS crystal oscillator can be used to clock an application circuit directly or by scaling the frequency.
A piezoelectric crystal is used by the RHBD CMOS crystal oscillator, a comparator-based Pierce oscillator, to provide precise and stable frequency. Unlike traditional Pierce oscillators, which rely on at least one inverter to provide the necessary gain, the oscillator method is novel.
The comparator is manufactured using enclosed layout transistor (ELT) devices, two guard rings, and a monolithic CMOS rail-rail architecture with a proportional to absolute temperature (PTAT) bias cell.
High resistance to TID-induced leakage is provided by the ELTs, and resistance to single event latch-up is provided by the two guard rings (SEL). Even in the presence of high TIDE and heavy ions, the duty cycle adjustment, twin guard rings, and ELTs work together to assure reliable operation of the circuit.
GLOBAL RAD-TOLERANT RUGGEDIZED OSCILLATORS MARKET SIZE AND FORECAST
The Global Rad-Tolerant Ruggedized Oscillators market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
RECENT DEVELOPMENT
A preliminary data sheet for our Rad Tolerant MCXO, which boasts low power consumption, incredibly quick warm-up, OCXO level stability, and ageing, has been made available by Q-Tech.
A high stability overtone SC-cut crystal with microprocessor-controlled compensation is the basis of Q-microcomputer Tech’s compensated crystal oscillator (MCXO).
The self-temperature sensing resonator essentially eliminates thermometry-related mistakes by employing a dual-mode oscillator. As a result, all fundamental TCXO and OCXO constraints are either eliminated or much diminished in the MCXO.
Renesas Electronics Corporation, a leading provider of cutting-edge semiconductor solutions, today introduced a new line of radiation-hardened (rad-hard) devices for satellite power management systems that are plastic-packaged.
The point of load (POL) buck regulator ISL71001SLHM/SEHM, the digital isolators ISL71610SLHM and ISL71710SLHM, and the 100V GaN FET and integrated low-side driver ISL73033SLHM are the four new devices.
The new portfolio provides space-grade solutions to missions in medium/geosynchronous Earth orbit (MEO/GEO) with longer lifetime requirements, as well as small satellites (smallsats) and higher density electronics, while lowering size, weight, and power (SWaP) costs. It does this by combining rad-hard assurance levels with the board area savings and cost advantages of plastic packaging.
COMPANY PROFILE
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