Dual conversion transmitter with single local oscillator
First Claim
1. A dual conversion transmitter, wherein the transmitter is configured to divide a first oscillator signal into a second oscillator signal and a third oscillator signal, wherein the transmitter is configured to perform frequency scaling such that the second and third oscillator signals have different frequencies from each other, the transmitter further comprising:
- a first mixer, wherein the first mixer is configured to utilize the second oscillator signal to facilitate frequency conversion; and
a second mixer, wherein the second mixer is configured to utilize the third oscillator signal to facilitate frequency conversion; and
a filter configured to filter the output of the first mixer and to provide the output of the filter to the input of the second mixer;
wherein the transmit frequency conversion is the result of one of;
(i) the sum of an intermediate frequency (“
IF”
) transmit signal frequency and the third oscillator signal frequency, and (ii) the difference of the IF transmit signal frequency and the third oscillator signal frequency.
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Accused Products
Abstract
The present disclosure relates to systems, devices and methods related to transmitters, and/or transceivers having a single, tunable oscillator in a dual conversion architecture. In various exemplary embodiments, this transmitter may include: a first mixer configured to receive a first oscillator signal from the single oscillator; a filter configured to band pass filter the converted signal and output a filtered signal; and a second mixer in communication with the filter, configured to receive the filtered signal. This dual conversion transmitter may be configured to receive a communication signal from an input to the transmitter and to output a converted signal based on the first oscillator signal and the communication signal. The second mixer may be configured to receive a scaled version of the first oscillator signal and to output a desired frequency output signal based on the scaled version of the first oscillator signal and the filtered signal.
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Citations
4 Claims
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1. A dual conversion transmitter, wherein the transmitter is configured to divide a first oscillator signal into a second oscillator signal and a third oscillator signal, wherein the transmitter is configured to perform frequency scaling such that the second and third oscillator signals have different frequencies from each other, the transmitter further comprising:
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a first mixer, wherein the first mixer is configured to utilize the second oscillator signal to facilitate frequency conversion; and a second mixer, wherein the second mixer is configured to utilize the third oscillator signal to facilitate frequency conversion; and a filter configured to filter the output of the first mixer and to provide the output of the filter to the input of the second mixer;
wherein the transmit frequency conversion is the result of one of;
(i) the sum of an intermediate frequency (“
IF”
) transmit signal frequency and the third oscillator signal frequency, and (ii) the difference of the IF transmit signal frequency and the third oscillator signal frequency. - View Dependent Claims (2, 3, 4)
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Specification