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US 9,853,686 B2Granted
Vector modulator and transceiver including the same
AssigneePhychips Inc.
InventorsSang-Sung Lee, Kyoung Seok Park
Life of this patent
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Abstract
A vector modulator of a transceiver may be provided that includes: a variable resistor having one end to which an input signal is transmitted; a variable capacitor which is connected in parallel to the variable resistor and has one end to which the input signal is transmitted; and a summing circuit which sums a signal of the other end of the variable resistor and a signal of the other of the variable capacitor.
Claims13
A vector modulator of a transceiver, the vector modulator comprising:
- a variable resistor having a first end to which an input signal is transmitted and a second end;
- a variable capacitor which is connected in parallel to the variable resistor and has a first end to which the input signal is transmitted and a second end;
- and
- a summing circuit configured to sum a first signal from the second end of the variable resistor and a second signal from the second end of the variable capacitor, wherein the first signal and the second signal have a 90 degree phase difference;
- and
- wherein a value of the variable resistor and a value of the variable capacitor are controlled according to a transmission leakage signal of a transmitter of the transceiver, which is input to a receiver of the transceiver, such that an amplitude and a phase of the output signal from the summing circuit are, respectively, equal to an amplitude and a phase of the transmission leakage signal.
3 more elements
A transceiver comprising:
- a transmitter configured to generate a transmitting signal;
- a receiver configured to receive a data signal through an antenna;
- and
- a vector modulator comprising:
- a variable resistor having a first end to which the transmitting signal is transmitted and a second end;
- a variable capacitor which is connected in parallel to the variable resistor and has a first end to which the transmitting signal is transmitted and a second end;
- and
- a summing circuit configured to sum a first signal and a second signal, wherein the first signal is a signal of the second end of the variable resistor and the second signal is a signal of the second end of the variable capacitor, and the first signal and the second signal have a 90 degree phase difference, and
- wherein the vector modulator is configured to:
- receive the transmitting signal,
- generate the first signal and the second signal,
- control amplitudes of the first and second signals based on a leakage signal of the transmitting signal such that an amplitude and a phase of an output signal from the summing circuit are, respectively, equal to an amplitude and a phase of the leakage signal of the transmitting signal, and
- output the output signal from the summing circuit for offsetting the leakage signal via input to the receiver.
10 more elements
Dependencies are inferred from the claim text.