Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1995-06-23
1997-07-22
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 43, 307 46, 307 48, 307 52, H02J 700
Patent
active
056506686
ABSTRACT:
A power supply for regulating energy delivered to a power consuming apparatus operating at low current levels includes a power source comprising at least one battery for generating an output voltage greater than a desired operating level. The power supply further includes a voltage regulator circuit comprising a light emitting diode (LED). The light emitting diode, which is preferably configured as a gallium arsenide diode, operates at a substantially constant voltage within a current range of between 10 to 25 micro amps. As a result, reliable and economical voltage regulating circuits can be constructed with substantially improved performance, as compared to circuits utilizing zener diodes as the active voltage regulating component, at the very low current levels required for such applications as line powered telecommunication devices.
REFERENCES:
patent: 3947753 (1976-03-01), Gushima et al.
patent: 4140962 (1979-02-01), Quinn
patent: 4613809 (1986-09-01), Skovmand
patent: 4906913 (1990-03-01), Stanojevic
patent: 4995072 (1991-02-01), Pedigo
Hellman Bengt Harry
Newlin Heather Marie
Dinicola Brian
Lockett Kim
Lucent Technologies - Inc.
Shoop Jr. William M.
Stafford Thomas
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