US5087897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator tunable by varying current in spiral inductor on ferrite substrate
Assignee: Motorola Solutions Inc
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Filing: 1991-03-04
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Granted: 1992-02-11
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Expires: 2011-03-04
Abstract
Abstract An oscillator circuit is tunable by a tuning circuit which includes a spiral inductor disposed on a ferrite substrate. The oscillator circuit is tuned or modulated by varying a current through the spiral inductor.
Inventors
- 👤 Jose I. Suarez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:51
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1231; H03B5/1203; H03B5/1237; H03B5/1256; H03B2201/00; H03B2201/02; H03B2201/0216
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
57 words
A circuit for generating a variable frequency output comprising: an oscillator circuit having a frequency output; a frequency variations means coupled to said oscillator circuit for varying said frequency output including: a conductive inductor pattern formed on a ferrite substrate; and a variable current source responsive to a frequency variation signal for providing current through said inductor.
Claim 2
Dependent Claim
57 words
A circuit for generating a variable frequency output comprising: an oscillator circuit having a frequency output; a frequency variations means coupled to said oscillator circuit for varying said frequency output including: a conductive inductor pattern formed on a ferrite substrate; and a variable current source responsive to a frequency variation signal for providing current through said inductor.
Claim 3
Dependent Claim
13 words
The circuit of claim 1, wherein said inductor pattern comprises a spiral pattern.
Claim 4
Dependent Claim
14 words
The circuit of claim 1, wherein said frequency variation signal comprises a modulating signal.
Claim 5
Dependent Claim
15 words
The circuit of claim 1, wherein said frequency variation signal comprises a frequency tuning signal.
Claim 6
Dependent Claim
42 words
A circuit for generating a frequency output comprising: a tunable oscillator circuit; and a tuning means for tuning said oscillator circuit including: a conductive inductor pattern formed on a ferrite substrate; and a current source for providing current through said spiral inductor.
Claim 7
Dependent Claim
42 words
A circuit for generating a frequency output comprising: a tunable oscillator circuit; and a tuning means for tuning said oscillator circuit including: a conductive inductor pattern formed on a ferrite substrate; and a current source for providing current through said spiral inductor.
Claim 8
Dependent Claim
13 words
The circuit of claim 5, wherein said inductor pattern comprises a spiral pattern.
Claim 9
Dependent Claim
45 words
A circuit for generating a modulated frequency output comprising: an oscillator circuit; and means for modulating said oscillator circuit including: a conductive inductor pattern formed on a ferrite substrate; means for providing current through said inductor pattern proportional to the amplitude of a modulating signal.
Claim 10
Dependent Claim
45 words
A circuit for generating a modulated frequency output comprising: an oscillator circuit; and means for modulating said oscillator circuit including: a conductive inductor pattern formed on a ferrite substrate; means for providing current through said inductor pattern proportional to the amplitude of a modulating signal.
Claim 11
Dependent Claim
13 words
The circuit of claim 6, wherein said inductor pattern comprises a spiral pattern.
Claim 12
Dependent Claim
67 words
A radio comprising: transceiver means for communicating communication signals; and a circuit for generating a variable frequency output including: an oscillator circuit having a frequency output; a frequency variations means coupled to said oscillator circuit for varying said frequency output including: a conductive inductor pattern formed on a ferrite substrate; and a variable current source responsive to a frequency variation signal for providing current through said inductor.
Claim 13
Dependent Claim
67 words
A radio comprising: transceiver means for communicating communication signals; and a circuit for generating a variable frequency output including: an oscillator circuit having a frequency output; a frequency variations means coupled to said oscillator circuit for varying said frequency output including: a conductive inductor pattern formed on a ferrite substrate; and a variable current source responsive to a frequency variation signal for providing current through said inductor.
Claim 14
Dependent Claim
13 words
The circuit of claim 9, wherein said inductor pattern comprises a spiral pattern.
Claim 15
Dependent Claim
14 words
The circuit of claim 9, wherein said frequency variation signal comprises a modulating signal.
Claim 16
Dependent Claim
15 words
The circuit of claim 9, wherein said frequency variation signal comprises a frequency tuning signal.
References Cited (Backward Citations)
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