Circuit for saving battery for use in a radio paging receiver and method thereof
First Claim
1. A circuit for saving battery power in a radio paging receiver having first and second radio frequency sections, said circuit generating a first battery saving signal and a second battery saving signal, comprising:
- waveform shaping means, coupled to receive said second battery saving signal, for charging a reference voltage to a level of a second voltage, converting output of said second radio frequency section into a digital signal, and cutting off a discharging path of said reference voltage for maintaining said reference voltage at a level of a first voltage;
means for generating said first battery saving signal and said second battery saving signal, and for processing data received from the output of said second radio frequency section, said first battery saving signal and said second battery saving signal being held in a specified state in accordance with the digital signal received from said waveform shaping means;
means for providing the first radio frequency section with power on a basis of said first battery saving signal; and
means for providing the second radio frequency section and said waveform shaping means with power on a basis of said second battery saving signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A circuit for saving battery power in a radio paging receiver having a process for supplying first and second power saving signals indicative of first and second ON and OFF power signals. A first radio-frequency section converts the received radio-frequency signals upon reception of the first ON power signal; a second radio-frequency section then filters and demodulates the output signals from the first radio-frequency section to provide demodulated signals having a first voltage upon reception of the second ON power. A waveform shaper shapes the waveform of the demodulated signals to provide digital signals to the processor upon reception of the second ON power signal; and a switch enables and disables transmission of the first and second ON and OFF power signals from a power source to the first and second radio-frequency sections and the waveform shaper upon reception of the first and second power saving signals.
-
Citations
20 Claims
-
1. A circuit for saving battery power in a radio paging receiver having first and second radio frequency sections, said circuit generating a first battery saving signal and a second battery saving signal, comprising:
-
waveform shaping means, coupled to receive said second battery saving signal, for charging a reference voltage to a level of a second voltage, converting output of said second radio frequency section into a digital signal, and cutting off a discharging path of said reference voltage for maintaining said reference voltage at a level of a first voltage; means for generating said first battery saving signal and said second battery saving signal, and for processing data received from the output of said second radio frequency section, said first battery saving signal and said second battery saving signal being held in a specified state in accordance with the digital signal received from said waveform shaping means; means for providing the first radio frequency section with power on a basis of said first battery saving signal; and means for providing the second radio frequency section and said waveform shaping means with power on a basis of said second battery saving signal. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of saving batteries for use in a radio paging receiver, comprising the steps of:
-
generating a first battery saving signal and a second battery saving signal at a same time; counting a number of data bits of a specific logic level to a given value; cutting off said first battery saving signal and said second battery saving signal at a same time, when the number of said data bits counted is smaller than a given value; and cutting off said first battery saving signal and then, with a given time delay, cutting off said second battery saving signal, when the number of said data bits connected is greater than the given value.
-
-
7. A circuit for saving battery power in a radio paging receiver having processor means for supplying first and second power saving signals indicative of first and second ON and OFF power signals, said circuit comprising:
-
a first radio-frequency section for receiving radio-frequency signals, and converting said radio-frequency signals into first output signals upon reception of said first ON power signal; a second radio-frequency section for filtering said first output signals, and demodulating said output signals to provide demodulated signals having a first voltage upon reception of said second ON power signal; waveform shaper means for shaping the waveform of said demodulated signals to provide digital signals to said processor means upon reception of said second ON power signal; and switch means for enabling and disabling transmission of said first and second ON and OFF power signals from a power source to said first and second radio-frequency sections and said waveform shaper means upon reception of said first and second power saving signals. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification