Wide-range local oscillator (LO) generators and apparatuses including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsNam-seog Kim, Sang-soo Ko, Byoung-joong Kang
Life of this patent
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Abstract
A local oscillator generator (LO generator) may be configured to transmit an LO signal to a mixer. The LO generator may include an input buffer configured to generate a first internal oscillator signal based on the input oscillator signal. The LO generator may include a frequency dividing circuit configured to generate a second internal oscillator signal based on dividing a frequency of the first internal oscillator signal. The LO generator may include an output buffer configured to generate the LO signal based on the second internal oscillator signal. The input buffer and the frequency dividing circuit may each be configured to receive a power voltage independently of the output buffer.
Claims20
A local oscillator generator (LO generator) configured to output a LO signal, the LO generator comprising:
- an input buffer configured to generate a first internal oscillator signal based on an input oscillator signal;
- a frequency dividing circuit configured to generate a second internal oscillator signal by dividing a frequency of the first internal oscillator signal based on a control signal and to receive a variable power voltage;
- and
- an output buffer configured to generate the LO signal based on the second internal oscillator signal,
- wherein the frequency dividing circuit includes
- a plurality of first frequency dividers configured to independently divide the frequency of the first internal oscillator signal at different frequency division ratios, and
- a selection circuit configured to select one of a plurality of output signals of the plurality of first frequency dividers based on the control signal.
An apparatus for wireless communication, the apparatus comprising:
- a local oscillator generator (LO generator) including a frequency dividing circuit and configured to generate a LO signal by dividing a frequency of an input oscillator signal;
- a mixer configured to receive the LO signal;
- and
- a controller configured to control the frequency of the input oscillator signal and a frequency division ratio of the frequency dividing circuit based on a carrier frequency of the wireless communication,
- wherein the controller is further configured to control a first power voltage supplied to the frequency dividing circuit based on the frequency division ratio.
A method for generating a local oscillator (LO) signal by using a LO generator including an input buffer, a frequency dividing circuit and an output buffer connected in series, the method comprising:
- obtaining a carrier frequency;
- controlling, based on the carrier frequency, a frequency of an input oscillator signal provided to the input buffer;
- controlling, based on the carrier frequency, a frequency division ratio of the frequency dividing circuit;
- and
- scaling, based on the frequency division ratio, a first power voltage supplied to the frequency dividing circuit.
Dependencies are inferred from the claim text.