Fast-Switching Digitally Tuned Oscillators DTO 12000 500 pages

DTO-12000-50M August 2007 Preliminary
Specification is subject to change without prior notification
Technology You Can Count On
9–15 GHz Digitally Tuned Oscillator DTO–12000–50M
Features
Applications
General Description
• Digital tuning using 12 bit
parallel input word
• Wideband Digitally Tuned
Source
• Frequency Bandwidth
9-15 GHz
• High Reliability Military
Applications
• EEPROM Linearized
• Simulators
• Fast Settling
•
The DTO-12000-50M provides a
low noise, fast settling wideband,
digitally tunable source for
critical applications in Radar
Simulators and EW Systems.
Multiple fundamental VCOs are
used in order to cover the desired
frequency band. High accuracy,
high resolution and high linearity
is achieved by efficiently using
EEPROM. A unique proprietary
technique is used for fast
switching between VCOs. This
source is commonly used as a
key component for wideband EW
systems and simulators.
EW Systems
< +2 MHz @ 2µs
• Low Phase Noise
–75 dBc/Hz@100 KHz
• Dimensions 4 x 3 x 0.5 in
This low noise fundamental
VCOs use a high performance
Silicon Bipolar transistors in
conjunction with a hyper-abrupt
silicon varactor diode to realize
three wideband sources which
are combined using a Wilkinson
power combiner. A GaAs FET
buffer amplifier is used to achieve
necessary power output and load
isolation of the oscillator. A diode
detector in the output is used to
provide
status
indicator.
Frequencies other than the ones
mentioned are available on
request.
Functional Block Diagram
Band
Switch
Decoder
`
1
VCO1
EEPROM
DAC
2
OPAMP
Tuning
Voltage
Power
Combiner
Σ
VCO2
3
VCO3
AMP