Communications: electrical – Continuously variable indicating – With meter reading
Patent
1991-03-18
1993-12-28
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
455 383, 455343, H04B 700
Patent
active
052743691
ABSTRACT:
A radio paging receiver having a primary power source, and outputs boosted by DC--DC converters as its secondary power sources. The radio paging receiver is provided with a first DC--DC converter which operates all the time or while the power source is on and a second DC--DC converter which operates intermittently to be active only when the load current is greater. The first DC--DC converter is so set as to be higher in source efficiency under light load and the second, as to normally operate even under heavy load. The first DC--DC converter supplies power to the circuits including a decoder in all the modes including the standby mode and the battery saving mode, both imposing only a light load. The second DC--DC converter intermittently operates to be active only in the heavy-load message data processing and message display modes, and supplies power to a CPU and an LCD signal processor in these modes. The voltages of the first and second DC--DC converters may be different from each other and, if they are, the output of the first DC--DC converter is supplied only to less loaded circuits.
REFERENCES:
patent: 4952927 (1990-08-01), DeLuca et al.
Kohga Kuniaki
Tsunoda Kazuyuki
Giust J.
NEC Corporation
Yusko Donald J.
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