Radio pager with high speed clock of controlled rise time

Details Radio pager with high speed clock of controlled rise time Radio pager with high speed clock of controlled rise time

1991-12-12

1994-02-01

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

455 383, 455343, H04Q 702, H04B 116

Patent

active

052835685

ABSTRACT:
A radio pager having means for automatically adjusting the rising time of a high-speed clock. The pager includes a plurality of circuit elements for adjusting the rising time of the high-speed clock, i.e., for compensating the degree of stability of a high-speed clock generating circuit. On the start of a low-speed clock, the high-speed clock generating circuit sequentially selects and connects the circuit elements to thereby count the resulting rising times of the high-speed clock. One of the circuit elements having resulted the shortest rising time is written to a storage. When the high-speed clock is needed, e.g., when a message should be displayed, the stored circuit element is connected to the high-speed clock generating circuit.

REFERENCES:
patent: 4437095 (1984-03-01), Akahori et al.

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