Circuit and method for controlling a timing of intermittent reception in radio equipment

A radio selective-calling receiver comprising:

• radio means for outputting a demodulation signal after demodulating a radio signal;
• synchronizing signal detecting means for detecting a synchronizing signal from said demodulation signal;
• detecting means for detecting a predetermined call number from said demodulation signal;
• call annunciating means for performing call annunciation in the case where said predetermined call number is detected;
• and
• controlling means which selects an ON/OFF time for said radio means having a shorter ON time than that in the case where reception of said synchronizing signal is disabled when said radio means is turned on and then performs ON/OFF control to said radio means and
• said controlling means including initial controlling means which selects an ON time for said radio means which is longer than a cycle in which predetermined signal is repeatedly transmitted from a plurality of the ON/OFF times for said radio means stored in said ON/OFF time memory and performs ON/OFF control to said radio means in response to turning-on of a power supply.

A method for controlling intermittent reception in a radio receiver, comprising the steps of:

• initializing said radio receiver with an ON time that is longer than a cycle in which a predetermined signal is repeatedly transmitted;
• demodulating a radio signal;
• detecting said predetermined signal from said demodulation signal;
• setting said ON time for said radio receiver during which said radio signal is amplified and demodulated to be shorter in the case where said predetermined signal is not detected;
• and
• setting said radio receiver into one of a plurality of different, sequential modes as said predetermined signal continues not to be received, such that a mode of said plurality of modes has a shorter ON time of said radio receiver than a subsequent mode of said plurality of modes.