Phase lock oscillator and communication equipment
AssigneeFujitsu Limited
InventorKunitoshi Yonekura
Life of this patent
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Abstract
The present invention relates to a phase lock oscillator which has a phase-locked loop including a reactive element and varies a reactance of the reactive element at an instant prior to an instant at which the phase-locked loop reaches a limit of maintaining its lock state, and relates to a communication equipment with the lock phase oscillator mounted therein. The phase lock oscillator and the communication equipment can flexibly adapt to variances in environment conditions and maintain stable and high service quality.
Claims17
A communication equipment comprising a transmitting part for transmitting transmission information by using an output signal of a phase lock oscillator which has a phase-locked loop including a reactive element and whose oscillation frequency varies according to an input signal, wherein said phase lock oscillator comprises:
- a limit discriminating section for discriminating an instant preceding an instant which is a limit that said phase-locked loop is capable of maintaining its lock state;
- and
- a controlling part for starting a processing of varying a reactance of said reactive element at a first instant succeeding said preceding instant, when said preceding instant is detected by said limit discriminating section, in which
- said controlling part controls said transmitting part to transmit said transmission information at a higher transmission rate than a transmission rate applied immediately before said preceding instant, the transmission being performed:
- during a specified period from an instant at which said preceding instant is detected, to said first instant;
- or after a predetermined time elapses from said first instant.
A communication equipment comprising a receiving part for receiving a reception signal by using an output signal of a phase lock oscillator which has a phase-locked loop including a reactive element and whose oscillation frequency varies according to an input signal, wherein said phase lock oscillator comprises:
- a limit discriminating section for discriminating an instant preceding an instant which is a limit that said phase-locked loop is capable of maintaining its lock state;
- and
- a controlling part for starting a processing of varying a reactance of said reactive element at a first instant succeeding said preceding instant, when said preceding instant is detected by said limit discriminating section, in which
- said controlling part controls said receiving part to perform a receiving processing of said reception signal at a higher transmission rate than a transmission rate applied immediately before said preceding instant, the reception being performed:
- during a specified period front an instant at which said preceding instant is detected, to said first instant;
- or after a predetermined time elapses from said first instant.
Dependencies are inferred from the claim text.