Apparatus for controlling modulation of an alternating waveform on a DC voltage signal within a low-noise block controller
AssigneeSilicon Laboratories Inc.
InventorScott Woodford
Life of this patent
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Abstract
An apparatus for controlling modulation of an alternating waveform on a direct current (DC) voltage signal within a low-noise block (LNB) controller is disclosed. The apparatus includes a DC power supply and a mixing/switching circuit. The DC power supply provides a steady DC voltage to a load, such as an LNB amplifier. The mixing/switching circuit adds a modulating signal to the DC voltage and selectively allows the modulated DC voltage to the load. The mixing/switching circuit includes a common control signal input for managing both of the above-mentioned two functions.
Claims12
An apparatus for controlling modulation of an alternating waveform on a direct current (DC) signal intended for a load, said apparatus comprising:
- a DC power supply for providing a DC voltage signal;
- and
- a mixing/switching circuit configured to add a modulating signal to said DC voltage signal and configured to selectively allow said modulated DC voltage signal to supply said load, wherein said mixing/switching circuit includes a common control signal input for controlling said adding function and said selectively allowing function.
7-14. (canceled)
A method for controlling modulation of an alternating waveform on a direct current (DC) signal intended for a load, said method comprising:
- providing a DC voltage signal;
- adding a modulating signal to said DC voltage signal;
- selectively allowing said modulated DC voltage signal to supply said load.
Dependencies are inferred from the claim text.