Patent EP0203756A2 successfully refreshed from Google Patents.
EP0203756A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Frequency synthesisers
Assignee: International Standard Electric Corp
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Filing: 1986-05-14
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Granted: —
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Expires: 2006-05-14
Abstract
Abstract An electronic circuit device, for facilitating channellising in a phase-locked loop frequency synthesiser, consists of a plurality of capacitors (7) which may be individually coupled in through appropriate electronic switches (8), at the input of a quartz oscillator (1), according to a suitable logic controlled by a microprocessor drived decoder (9) in order to determine an exact shift of the system reference frequency.
Inventors
- 👤 Armando Clementi
- 👤 Renato Norbiato
- 👤 Emilio Sperduti
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:40
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03L7/18; H03L7/183
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
45 words
An electronic circuit device for facilitating channellising in a frequency synthesiser, characterised in that it comprises a plurality of capacitors (7) connected in parallel with each other, and individually cascade connectable, by means of appropriate electronic switches (8), to the input of a quartz oscillator
Claim 2
Dependent Claim
45 words
An electronic circuit device for facilitating channellising in a frequency synthesiser, characterised in that it comprises a plurality of capacitors (7) connected in parallel with each other, and individually cascade connectable, by means of appropriate electronic switches (8), to the input of a quartz oscillator
Claim 3
Dependent Claim
58 words
(1) generating the system reference frequency, as well as a decoder (9) which controls the opening and closing of said electronic switches (8) in accordance with a suitable control logic whose purpose is to bring about, by means of said capacitor connection, a certain shift of said system reference frequency in order to obtain the desired channellising feature.
Claim 4
Dependent Claim
58 words
(1) generating the system reference frequency, as well as a decoder (9) which controls the opening and closing of said electronic switches (8) in accordance with a suitable control logic whose purpose is to bring about, by means of said capacitor connection, a certain shift of said system reference frequency in order to obtain the desired channellising feature.
Claim 5
Dependent Claim
44 words
An electronic circuit device for facilitating channellising in a frequency synthesiser as claimed in claim 1, characterised in that there are at least two capacitors (7) their number thereof depending on the shift of the system reference frequency which is to be brought about.
Claim 6
Dependent Claim
26 words
An electronic circuit device for facilitating channellising in a frequency synthesiser as claimed in claim 1, characterised in that said electronic switches (8), are diode switches.
Claim 7
Dependent Claim
23 words
A frequency synthesiser including an electronic circuit device for facilitating channellising therein and as claimed in any one of claims 1 to 3.
References Cited (Backward Citations)
No citation records indexed.
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