Corporation (TOKYO: 6502) today announced that it has developed a
prototype reference clock oscillator fabricated with standard CMOS
technology that achieves the world's highest class accuracy. Used to
replace a conventional crystal oscillator, the new device will support
the miniaturization of electronic devices.
Toshiba will present the oscillator technology at the 2014 Symposia on
VLSI Technology and Circuits in Honolulu, Hawaii, on June 13.
In recent years, demand for the miniaturization of electronic
components, the source of complex functionality in electronic products,
has extended to oscillators, stimulating interest in ultra-small
Although conventional crystal oscillators offer excellent accuracy of
oscillation frequency, they require a relatively large package due to
the size of the crystal. Smaller CMOS oscillators have been designed,
but with a much lower oscillation frequency, due to large temperature
Toshiba has developed a technology for precise calbration of the
temperature dependence of oscillation frequencies in CMOS oscillators.
Its application has secured a high precision CMOS oscillator with
accuracy of less than +/-100ppm (0.01%), comparable to crystal
oscillators. In addition, by taking advantage of the digital computing
capability of CMOS, Toshiba has also achieved a wide range of frequency
outputs (2-40MHz) in 40Hz steps. Conventional crystal oscillators output
at a fixed frequency.
During the initial test, the oscillation frequencies of the CMOS
oscillator are measured and calibrated at multiple temperatures, in
order to realize high accuracy. The junction temperature can be quickly
changed by an on-chip heater, realizing low-cost testing and
high-accuracy calibration. As a result, Toshiba has developed a
high-accuracy oscillator with thermal design using on-chip heater and
stabilizing temperature near the oscillator for the calibration. The
digital calibration data, which is calculated and stored during the
test, is automatically applied in actual operation.
Toshiba plans to commercialize the new CMOS oscillator within 2 to 3
years, and aims to reduce its volume to one third that of a conventional
crystal oscillator. Toshiba will also integrate the oscillator into
system LSI, such as MCU and ASIC.
Toshiba Corporation, a Fortune 500 company, channels world-class
capabilities in advanced electronic and electrical product and systems
into five strategic business domains: Energy & Infrastructure, Community
Solutions, Healthcare Systems & Services, Electronic Devices &
Components, and Lifestyles Products & Services. Guided by the principles
of The Basic Commitment of the Toshiba Group, "Committed to People,
Committed to the Future", Toshiba promotes global operations towards
securing "Growth Through Creativity and Innovation", and is contributing
to the achievement of a world in which people everywhere live in safe,
secure and comfortable society.
Founded in Tokyo in 1875, today's Toshiba is at the heart of a global
network of over 590 consolidated companies employing over 200,000 people
worldwide, with annual sales surpassing 6.5 trillion yen (US$63 billion).
To find out more about Toshiba, visit www.toshiba.co.jp/index.htm
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