Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Patent
1996-01-31
1998-02-24
Eisenzopf, Reinhard J.
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
455 69, 455127, 455343, 363 17, H04B 116, H04B 700
Patent
active
057220573
ABSTRACT:
Methods and apparatus for variably converting DC voltage to a different DC voltage level are effected by a multi-resonant electronic power converter with a wide output voltage dynamic range. The power conversion is accomplished by converting the DC voltage to an AC signal, adjusting or attenuating the AC signal to the desired amplitude, and then converting the AC signal back to a DC voltage. The output voltage may be adjusted by altering the frequency of the AC signal also known as the switching frequency. A wide dynamic range is achieved at a narrow switching frequency bandwidth by inserting either a fourth or higher order low pass filter or a notch filter at the output of the switching transistor. The high roll-off rate exhibited by either filter provides a relatively high dynamic range in a narrow frequency range.
REFERENCES:
patent: 4409647 (1983-10-01), Terkanian
patent: 5065301 (1991-11-01), Shioya et al.
patent: 5159541 (1992-10-01), Jain
patent: 5204970 (1993-04-01), Stengel et al.
patent: 5345598 (1994-09-01), Dent
Bhattacharya Sam
Eisenzopf Reinhard J.
Lucent Technologies - Inc.
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