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US 9,431,961 B2Granted
Phase shifting mixer
AssigneeQUALCOMM Incorporated
InventorsHasnain Mohammedi Lakdawala, Bin Fan, Ojas Mahendra Choksi
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Abstract
Performing quadrature combining and adjusting including: a plurality of mixing circuits configured to generate a plurality of frequency converted signals; at least one mixing circuit of the plurality of mixing circuits is configured with a plurality of paths, each path representing one linearity mode; and a plurality of combining circuits configured to combine the plurality of frequency converted signals to generate a differential baseband output signal.
Claims18
An apparatus comprising:
- a plurality of mixing circuits configured to generate a plurality of frequency converted signals;
- at least one mixing circuit of the plurality of mixing circuits is configured with a plurality of paths, each path representing one linearity mode,
- the plurality of paths comprising:
- a first path of a high-linearity mode configured with a first metal oxide semiconductor resistor;
- and
- a second path of a low-linearity mode configured with a second metal oxide semiconductor resistor and a first mode switch,
- the first and second metal oxide semiconductor resistors are controlled by a local oscillating signal;
- and
- a plurality of combining circuits configured to combine the plurality of frequency converted signals to generate a differential baseband output signal.
6 more elements
An apparatus comprising:
- plural means for mixing configured to generate a plurality of frequency converted signals,
- at least one means of the plural means for mixing includes means for adjusting resistance as a function of a linearity mode,
- wherein the means for adjusting resistance comprises means for switching and means for varying resistance as the function of the linearity mode;
- and
- means for combining the plurality of frequency converted signals to generate a plurality of a differential baseband output signal.
2 more elements
Dependencies are inferred from the claim text.