Acoustic transformer in transmission chain
AssigneeQorvo US, Inc.
InventorNadim Khlat
Life of this patent
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Abstract
An acoustic transformer in a transmitter chain is disclosed. In one aspect, a differential power amplifier may produce a differential signal that is provided to a first transformer. A differential output of this first transformer is provided to an acoustic transformer that provides a single ended output signal for use by an acoustic filter. By making the second transformer an acoustic transformer, the second transformer may be integrated into the same circuitry that forms the acoustic filter, thereby simplifying the die. Further, the acoustic transformer may be tuned if ferroelectric resonators are used, which provides strong out-of-band signal cancelation.
Claims18
A transmitter chain comprising:
- a power amplifier having a differential output;
- a first transformer coupled to the differential output and comprising a transformer differential output;
- a second transformer coupled to the transformer differential output, the second transformer comprising an acoustic transformer and a single-ended output;
- and
- an acoustic filter comprising a tunable ferroelectric network element.
An acoustic die comprising:
- an acoustic transformer comprising a differential input and a single-ended output;
- and
- an acoustic filter coupled to the single-ended output.
Dependencies are inferred from the claim text.