Modulated power supply

Details Modulated power supply Modulated power supply

2006-02-21

2006-02-21

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C330S155000

Reexamination Certificate

active

07002322

ABSTRACT:
A modulated power supply comprises first and second coding units. The second coding unit is responsive to a feed-forward error signal representing the error between the coded output of the first coding unit and an input modulating signal. The second coding unit codes for the more limited range of the error signal, thereby improving resolution. The first coding unit can comprise M coding units arranged in parallel with one another. The M coding units are operated in a manner which increases the apparent number of quantisation levels. This is achieved by feeding a modified version of the input modulating signal to each of the M coding units or by offsetting by quantisation grids of the M coding units. The improvements are particularly useful for improving performance where the input modulating signal has a wide bandwidth.

REFERENCES:
patent: 4384321 (1983-05-01), Rippel
patent: 5861777 (1999-01-01), Sigmon et al.
patent: 5886572 (1999-03-01), Myers et al.
patent: 6292378 (2001-09-01), Brooks et al.
patent: 6795009 (2004-09-01), Duffy et al.
patent: 6850045 (2005-02-01), Muratov et al.
patent: 6922044 (2005-07-01), Walters et al.

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