US4646035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High precision tunable oscillator and radar equipped with same
Assignee: Thales SA
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Filing: 1985-01-10
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Granted: 1987-02-24
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Expires: 2005-01-10
Abstract
Abstract A frequency tunable oscillator is associated to a memory (4) which stores the digital values required for controlling the oscillator with a view to obtaining the desired frequency. The digital values are converted by a digital-analog converter into a control voltage for controlling the oscillator (1). The device allows to compensate any non-linear behaviour of the components, as well as the variations of their behaviour with temperature. The present invention is applicable primarily to oscillators generating a frequency which is proportional to a voltage supplied to the oscillator.
Inventors
- 👤 Pierre Chapelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:27
CPC Classifications
H; H03; H03L; H03L1/00; H03L1/02; H03L1/022; H03L1/023; H03L1/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A high frequency generator comprising: a controllable oscillator; temperature sensors thermally connected to said oscillator having an output; an analog to digital converter connected to said oscillator's output and driven threby and further connected to said temperature sensors for converting the output of said temperature sensor to a digital signal; a permanent non-volatile memory having the address bus and the data bus connected to said analog to digital converter for storing the digital signal produced by said analog to digital converter; a digital to analog converter coupled to said permanent non-volatile memory; connecting means for coupling said controllable oscillator to said digital to analog converter thereby providing the stored signal values in said non-volatile memory sufficient to control said oscillator at the desired frequency for each working temperature.
Claim 2
Dependent Claim
128 words
A high frequency generator comprising: a controllable oscillator; temperature sensors thermally connected to said oscillator having an output; an analog to digital converter connected to said oscillator's output and driven threby and further connected to said temperature sensors for converting the output of said temperature sensor to a digital signal; a permanent non-volatile memory having the address bus and the data bus connected to said analog to digital converter for storing the digital signal produced by said analog to digital converter; a digital to analog converter coupled to said permanent non-volatile memory; connecting means for coupling said controllable oscillator to said digital to analog converter thereby providing the stored signal values in said non-volatile memory sufficient to control said oscillator at the desired frequency for each working temperature.
Claim 3
Dependent Claim
16 words
A high frequency generator as in claim 1 wherein said oscillator comprises: a frequency servo loop.
Claim 4
Dependent Claim
37 words
A high frequency generator according to claim 2 in which the frequency servo loop comprises a voltage controlled oscillator, data stored in said memory being adapted to linearize individually the response of voltage controlled oscillator associated thereto.
Claim 5
Dependent Claim
17 words
A high frequency generator according to claim 1 which employs means to operate as a hyperfrequency generator.
Claim 6
Dependent Claim
14 words
A high frequency generator according to claim 1 wherein said memory is a PROM.
Claim 7
Dependent Claim
135 words
A radar unit employing a high frequency oscillator wherein said oscillator comprises: a controllable oscillator; temperature sensors thermally connected to said oscillator having an output; an analog to digital converter connected to said oscillator's output and driven threby and further connected to said temperature sensors for converting the output of said temperature sensor to a digital signal; a permanent non-volatile memory having the address bus and the data bus connected to said analog to digital converter for storing the digital signal produced by said analog to digital converter; a digital to analog converter coupled to said permanent non-volatile memory; connecting means for coupling said controllable oscillator to said digital to analog converter thereby providing the stored signal values in said non-volatile memory sufficient to control said oscillator at the desired frequency for each working temperature.
Claim 8
Dependent Claim
135 words
A radar unit employing a high frequency oscillator wherein said oscillator comprises: a controllable oscillator; temperature sensors thermally connected to said oscillator having an output; an analog to digital converter connected to said oscillator's output and driven threby and further connected to said temperature sensors for converting the output of said temperature sensor to a digital signal; a permanent non-volatile memory having the address bus and the data bus connected to said analog to digital converter for storing the digital signal produced by said analog to digital converter; a digital to analog converter coupled to said permanent non-volatile memory; connecting means for coupling said controllable oscillator to said digital to analog converter thereby providing the stored signal values in said non-volatile memory sufficient to control said oscillator at the desired frequency for each working temperature.
Claim 9
Dependent Claim
15 words
A radar according to claim 6 which employs a frequency modulated continuous wave (FM-CW) radar.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |