Self-tuning direct coupled data limiter of a battery saver type paging receiver
First Claim
1. A battery saver type paging receiver including:
- an input section for receiving a paging signal transmitted from an external source, said paging signal including modulated digitally coded data words, and for demodulating said received paging signal to recover an analog signal representing the digitally coded data words;
a data limiter section for converting the recovered analog signal into a corresponding binary bit stream representing the coded data words of said paging signal; and
a battery saver section coupled to said input section and said data limiter section and to a battery powered source for cyclically energizing and de-energizing said input and data limiter sections from said battery powered source during awake and sleep periods, respectively, said data limiter section comprising;
first means operative in a first mode to acquire a peak amplitude from the recovered analog signal and to generate a first digital word representative thereof, said first means including a first storage means for storing the first digital word, said first means operative in a second mode to cause said first storage means to hold the first digital word;
second means operative in said first mode to acquire a valley amplitude from the recovered analog signal and to generate a second digital word representative thereof, said second means including a second storage means for storing the second digital word, said second means operative in said second mode to cause said second storage means to hold the second digital word;
said first and second means being each further operative in a third mode to alter the respective first and second word thereof a predetermined count;
control means responsive to at least one command signal to control the transfer of operation of said first and second means among the first, second and third modes;
third means for converting the recovered analog signal into its corresponding binary bit stream based on said first and second digital words; and
means for generating a reference signal wherein the control means is governed by the reference clock signal in controlling the transfer among the modes of the first and second means.
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Accused Products
Abstract
A battery saver type paging receiver includes an improved peak and valley amplitude detection type data limiter section with mode control operation thereof, digital word storage of acquired peak and valley amplitude values, and self tuning capabilities. More specifically, the data limiter section includes a controller for controlling the peak and valley detection circuits to acquire respective peak and valley amplitude values in digital word form in a first operational mode and to hold the peak and valley amplitude digital words in corresponding storage registers in a second operational mode. The controller may transfer the data limiter section into a third operational mode during which the peak and valley digital words may be altered a predetermined count to effect a self-tuning thereof. In one embodiment, the third mode of operation is effected during the transfer between the second and first modes of operation.
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Citations
9 Claims
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1. A battery saver type paging receiver including:
- an input section for receiving a paging signal transmitted from an external source, said paging signal including modulated digitally coded data words, and for demodulating said received paging signal to recover an analog signal representing the digitally coded data words;
a data limiter section for converting the recovered analog signal into a corresponding binary bit stream representing the coded data words of said paging signal; and
a battery saver section coupled to said input section and said data limiter section and to a battery powered source for cyclically energizing and de-energizing said input and data limiter sections from said battery powered source during awake and sleep periods, respectively, said data limiter section comprising;first means operative in a first mode to acquire a peak amplitude from the recovered analog signal and to generate a first digital word representative thereof, said first means including a first storage means for storing the first digital word, said first means operative in a second mode to cause said first storage means to hold the first digital word; second means operative in said first mode to acquire a valley amplitude from the recovered analog signal and to generate a second digital word representative thereof, said second means including a second storage means for storing the second digital word, said second means operative in said second mode to cause said second storage means to hold the second digital word; said first and second means being each further operative in a third mode to alter the respective first and second word thereof a predetermined count; control means responsive to at least one command signal to control the transfer of operation of said first and second means among the first, second and third modes; third means for converting the recovered analog signal into its corresponding binary bit stream based on said first and second digital words; and means for generating a reference signal wherein the control means is governed by the reference clock signal in controlling the transfer among the modes of the first and second means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- an input section for receiving a paging signal transmitted from an external source, said paging signal including modulated digitally coded data words, and for demodulating said received paging signal to recover an analog signal representing the digitally coded data words;
Specification