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US 9,438,169 B2Granted
Mixer
AssigneeQualcomm Technologies International, Ltd.
InventorsJames Collier, Tim Newton
Life of this patent
Estimating the term…
Abstract
A frequency shifter configured to shift the frequency of a signal, the frequency shifter comprising: a resonant structure configured to mechanically resonate at a first frequency; and a plurality of capacitors, each capacitor having a variable plate separation distance, wherein the resonant structure is configured to cause the plate separation distance of each capacitor to oscillate so as to cause the frequency of the signal to shift by the first frequency.
Claims17
A receiver comprising:
- an input for receiving an incoming signal;
- a first input buffer arranged to buffer the incoming signal and provide a first buffered signal and an inverse first buffered signal;
- a second input buffer arranged to buffer the incoming signal and provide a second buffered signal and an inverse second buffered signal;
- a first capacitor having a first plate coupled to the first buffered signal;
- a second capacitor having a first plate coupled to the inverse first buffered signal and a second plate coupled to a second plate of the first capacitor;
- a third capacitor having a first plate coupled to the second buffered signal;
- a fourth capacitor having a first plate coupled to the inverse second buffered signal and a second plate coupled to a second plate of the third capacitor;
- and
- a resonant structure configured to mechanically oscillate at a first frequency, wherein the resonant structure is configured so that the oscillations of the resonant structure cause oscillations in the capacitances of the first, second, third, and fourth capacitors.
6 more elements
A mixer comprising:
- an input buffer arranged to buffer an incoming signal and provide a first buffered signal and an inverse first buffered signal;
- a first capacitor includes a first plate coupled to the first buffered signal;
- a second capacitor includes a first plate coupled to the inverse first buffered signal and a second plate coupled to a second plate of the first capacitor;
- and
- a resonant structure configured to mechanically oscillate at a first frequency, wherein the resonant structure is configured so that the oscillations of the resonant structure cause oscillations in the capacitance of the first capacitor and oscillations in the capacitance of the second capacitor.
2 more elements
Dependencies are inferred from the claim text.