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Hyperabrupt Varactor-Tuned
Oscillators
Technical Data
Features
•25 MHz to 2.3 GHz Coverage
•Fast Tuning
•Fast Setting Time
•+20 VDC Max Tuning Voltage
•10 mW Output Power
•± 2.0 dB Output Flatness
•Hermetic Thin-film Construction
Description
HP VTO-9000 Hyperabrupt Series oscillators use a silicon transistor chip as a negative resistance oscillator. The oscillation frequency is determined by a silicon hyperabrupt varactor diode acting as a voltage-variable capacitor in a thin-film microstripline resonator.
This provides extremely fast tuning speed limited primarily by the internal impedance of the user-supplied voltage driver.
This family of oscillators is similar to the standard commercial VTO-8000 Series except for the incorporation of a silicon hyperabrupt varactor tuning diode. This enables the oscillator to be tuned over the specified range in less than 20 volts rather than 40 to 50Ê volts in conventional oscillators.
The VTO-9000 Series VTOs are packaged in TO-8 transistor cans for simple installation in a conventional 50-ohm microstripline PC board. They are ideal for most compact
Schematic
+15 V
Output Matching |
RF Output |
Series Feedback
|
Varactor |
V Tune |
|
Tuning |
Resonator |
Port |
|
Capacitor |
|
VTO-9000 Series
Pin Configuration
TO-8V
|
|
GROUND |
+V TUNE |
3 |
RF OUT |
|
|
|
|
2 |
4 |
|
1 |
|
|
+DC |
|
|
VOLTAGE |
CASE GROUND |
lightweight commercial and military equipment designs.
Test fixturing is also available for lab bench test applications. See the “Test Fixtures for TO-8 Packages” section for additional information and outlines.
Applications
The VTO-9000 Series oscillators may be used in the same applications as VTO-8000 Series oscillators. The VTO-9000 Series is the desired choice for superior linearity and modulation sensitivity requirements.
5964-9814E |
9-30 |
Electrical and Performance Specifications
Guaranteed Specifications @ 25°C Case Temperature (0° to +65°C Operating Temperature)
Model No. |
VTO–9032 |
VTO–9050 |
VTO–9068 |
VTO–9090 |
|
|
|
|
|
Frequency Range, Min. |
320–640MHz |
500–1000MHz |
680–1360MHz, |
900–1600MHz |
Power Output Into 50–ohm Load, Min . |
10mW/+10dBm |
10mW/+10dBm |
10mW/+10dBm |
10mW/+10dBm |
Power Output Variation @ 25°C, Max. |
± 2dB |
± 2dB |
± 2dB |
± 2dB |
Operating Carrier Temperature Range |
0°to +65°C |
0°to +65°C |
0°to +65°C |
0°to +65°C |
Frequency Drift Over Operating Temperature, Typ. |
12 MHz |
20 MHz |
20 MHz |
20 MHz |
Pulling Figure (12 dB Return Loss), Typ. |
20 MHz |
20 MHz |
25 MHz |
25 MHz |
Pushing Figure, +15 VDC Supply, Typ. |
5 MHz/V |
5 MHz/V |
6 MHz/V |
6 MHz/V |
Harmonics, Below Carrier, Typ. |
–14 dB |
–10 dB |
–14 dB |
–14 dB |
Spurious Output Below Carrier, Min. |
–60 dB |
–60 dB |
–60 dB |
–60 dB |
Tuning Voltage |
|
|
|
|
Low Frequency, Min. |
0 VDC |
0 VDC |
0 VDC |
2 VDC |
High Frequency, Max |
20 VDC |
20 VDC |
20 VDC |
18 VDC |
Maximum Tuning Voltage |
+20VDC |
+20VDC |
+20VDC |
+20VDC |
Tuning Port Capacitance, Nom. |
200pF |
200pF |
190pF |
190pF |
Phase Noise, Single Sideband, |
|
|
|
|
1 Hz Bandwidth, Typ. |
|
|
|
|
50 kHz From Carrier |
–95 dBc/Hz |
–100 dBc/Hz |
–95 dBc/Hz |
–100 dBc/Hz |
100 kHz From Carrier |
–103 dBc/Hz |
–108 dBc/Hz |
–103 dBc/Hz |
–108 dBc/Hz |
Input Power, ± 1% Regulaltion |
|
|
|
|
Voltage, Nom. |
+15VDC |
+15VDC |
+15VDC |
+15VDC |
Current, Max. |
50 mA |
50 mA |
50 mA |
50 mA |
Case Style |
TO–8V |
TO–8V |
TO–8V |
TO–8V |
|
|
|
|
|
Electrical and Performance Specifications
Guaranteed Specifications @ 25°C Case Temperature (0° to +65°C Operating Temperature)
Model No. |
VTO–9120 |
VTO–9130 |
|
|
|
Frequency Range, Min. |
1200–2000MHz |
1300–2300MHz |
Power Output Into 50–ohm load, Min. |
10mW/+10dBm |
10mW/+10dBm |
Power Output Variation @ 25°C, Max. |
± 2dB |
± 1.5dB |
Operating Case Temperature Range |
0°to +65°C |
0°to +65°C |
Frequency Drift Over Operating Temperature, Typ. |
25 MHz |
25 MHz |
Pulling Figure (12 dB Return Loss), Typ. |
25 MHz |
50 MHz |
Pushing Figure, +15 VDC Supply, Typ. |
10 MHz/V |
10 MHz/V |
Harmonics, Below Carrier, Typ. |
–14 dB |
–15 dB |
Spurious Output Below Carrier, Min. |
–60 dB |
–60 dB |
Tuning Voltage |
3± 1VDC |
|
Low Frequency |
2 VDC Min. |
|
High Frequency |
12± 2VDC |
20 VDC Max. |
Maximum Tuning Voltage |
+20VDC |
+20VDC |
Tuning Port Capacitance, Nom. |
100pF |
100pF |
Phase Noise, Single Sideband, |
|
|
1 Hz, Bandwidth, Typ. |
|
|
50 kHz From Carrier |
–97 dBc/Hz |
–97 dBc/Hz |
100 kHz From Carrier |
–105 dBc/Hz |
–105 dBc/Hz |
Input Power, ± 1% Regulation |
|
|
Voltage,Nom. |
+15VDC |
+15VDC |
Current, Max. |
50 mA |
50 mA |
Case Style |
TO–8V |
TO–8V |
|
|
|
9-31
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