Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A method for producing a clock frequency in a radio device, which includes: a radio frequency part (1) for transmitting or receiving on several optionally selectable radio channels, each of which is assigned a frequency band, a base frequency part (2) that requires a clock frequency for timing of its operation, characterized in that, in said method: corresponding to each radio channel a clock frequency is assigned having no harmonic frequency that is within the frequency band of said radio channel, and in response to the selection of a radio channel said assigned corresponding clock frequency is produced.
Claim 2
Dependent Claim
87 words
The method for producing a clock frequency in a radio device according to claim 1, in which operation timed by the clock frequency produces interference spectra located around the clock frequency and its harmonic frequencies, characterized in that the clock frequencies are assigned so that for each radio channel there exists at least one clock frequency that has no harmonic frequency or no interference spectrum, which is created when said frequency is used as a clock frequency, that is within the frequency band of said radio channel.
Claim 3
Dependent Claim
108 words
The method according to claim 1 or 2, characterized in that, in said method: one of several clock frequencies is assigned to be a default frequency, a clock frequency is assigned separately for a radio channel only if a harmonic frequency of the default frequency or an interference spectrum, which is created when said frequency is used as a clock frequency, is within the frequency band of said radio channel, and the default clock frequency is produced in response to the selection of a radio channel, if there is no separately assigned clock frequency related to said radio channel, and a separately assigned clock frequency is produced otherwise.
Claim 4
Independent Claim
42 words
The method according to any preceding claim, characterized in that a clock frequency is assigned for each radio channel by storing in the radio device the information indicating the clock frequency (N, R) in connection with the information indicating the channel (CHn).
Claim 5
Dependent Claim
154 words
An arrangement for producing a clock frequency in a radio device, which includes: a radio frequency part (1) for transmitting or receiving on several optionally selectable radio channels, each of which is assigned a frequency band, a base frequency part (2) that requires a clock frequency for timing of its operation, characterized in that, said arrangement includes: means (5) for producing a clock frequency from several optionally selectable clock frequencies that are selected so that a clock frequency corresponding to each radio channel exists that has no harmonic frequency within the frequency band of said radio channel, means (6) for assigning a clock frequency for each radio channel that has no harmonic frequency within the frequency band of said radio channel, and means (3, 6) for controlling the means (5) for producing a clock frequency in response to the selection of the radio channel, to produce the clock frequency assigned for the radio channel.
Claim 6
Dependent Claim
38 words
The arrangement according to claim 5, characterized in that the means for assigning a clock frequency corresponding to each radio channel include stored information (6), which connect the corresponding clock frequency to one or more radio channels (CHn).
Claim 7
Dependent Claim
31 words
The arrangement according to claim 5 or 6, characterized in that the means for controlling the means (5) for producing a clock frequency inlude a CPU (3) of the radio device.
Claim 8
Dependent Claim
121 words
The arrangement according to one of the claims 5 - 7, characterized in that the means (5) for producing a clock frequency include a frequency synthesizer based on a phase-locked loop, which receives a reference frequency (f ref ) and outputs a synthesized clock frequency (CLK) and includes: a first programmable frequency divider (13), that has a first programmable divisor (R), a second programmable frequency divider (12), that has a second programmable divisor (N), and a phase comparator (14), and in which the reference frequency (f ref ) is connected to the phase comparator (14) via the first programmable frequency divider (13) and the synthesized clock frequency (CLK) is connected to the phase comparator (14) via the second frequency divider (12).
Claim 9
Dependent Claim
27 words
The arrangement according to claim 8, characterized in that the reference frequency (f ref ) is obtained from a crystal oscillator (4) of the radio frequency part.
Claim 10
Dependent Claim
49 words
The arrangement according to claims 8 or 9, characterized in that it includes stored information (6) by which corresponding divisors (N, R) are connected to one or more radio channels (CHn), which divisors are programmed into the dividers (12, 13) of the synthesizer to produce the assigned clock frequency.