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US 2007/0178869 A1Published application
Multi-frequency synthesizing apparatus and method for multi-band RF receiver
AssigneeSamsung Electronics Co., Ltd.
InventorsEun Park, Hyun Chae, Hoon Kim
Life of this patent
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Abstract
A frequency synthesizing apparatus and method for a multi-band radio frequency (RF) receiver is provided. The frequency synthesizing apparatus includes a simple circuit configuration with a single SSB mixer and thus, may synthesize six high frequency signals. Signals to be inputted into the SSB mixer include a first signal and a second signal. The first signal is generated based on a VCO and a PPF. Also, the second signal is selected from a plurality of frequency divided signals which are generated by dividing a signal generated in the VCO via a plurality of dividers.
Claims21
A frequency synthesizer comprising:
- a voltage controlled oscillator which generates a first signal;
- a polyphase filter which adjusts a phase of the first signal and generates a quadrature (Q) signal of the first signal;
- a plurality of dividers which generates a plurality of frequency divided signals based on the first signal, and Q signals of the plurality of frequency divided signals;
- and
- a single side band (SSB) mixer which generates a frequency synthesized signal having a frequency which is a frequency synthesis of the first signal and a second signal, from the first signal and the Q signal of the first signal, and the second signal and a Q signal of the second signal, wherein the second signal and the Q signal of the second signal are selected from the plurality of frequency divided signals and the Q signals of the plurality of frequency divided signals.
2 more elements
A frequency synthesizer comprising:
- a voltage controlled oscillator which generates a signal;
- a first divider which divides a frequency of the signal generated by the voltage controlled oscillator by two to generate a first divided signal and a Q signal of the first divided signal;
- a second divider which divides a frequency of the signal generated by the voltage controlled oscillator by three to generate a second divided signal;
- a third divider which divides a frequency of the second divided signal by five to generate a third divided signal;
- a polyphase filter which adjusts a phase of the third divided signal to generate a quadrature (Q) signal of the third divided signal;
- and
- a single side band (SSB) mixer which generates a frequency synthesized signal having a frequency which is a frequency synthesis of the first divided signal and the third divided signal, from the first divided signal and the Q signal of the first divided signal, and the third divided signal and the Q signal of the third divided signal.
4 more elements
A method of synthesizing frequencies, the method comprising:
- generating a first signal;
- generating a quadrature (Q) signal of the first signal by adjusting a phase of the first signal;
- generating a plurality of frequency divided signals and Q signals of the plurality of frequency divided signals based on the first signal;
- and
- selecting one of the plurality of frequency divided signals and a corresponding one of the Q signals of the plurality of frequency divided signals as a second signal and a Q signal of the second signal, respectively;
- and
- generating a frequency synthesized signal having a frequency which is a frequency synthesis of the first signal and the second signal, from the first signal and the Q signal of the first signal and the second signal and the Q signal of the second signal.
4 more elements
A computer readable storage medium storing a program for executing a method of synthesizing frequencies, the method comprising:
- generating a first signal;
- generating a quadrature (Q) signal of the first signal by adjusting a phase of the first signal;
- generating a plurality of frequency divided signals and Q signals of the plurality of frequency divided signals based on the first signal;
- and
- selecting one of the plurality of frequency divided signals and a corresponding one of the Q signals of the plurality of frequency divided signals as a second signal and a Q signal of the second signal, respectively;
- and
- generating a frequency synthesized signal having a frequency which is a frequency synthesis of the first signal and the second signal, from the first signal and the Q signal of the first signal and the second signal and the Q signal of the second signal.
4 more elements
A method of synthesizing frequencies, the method comprising:
- generating an initial signal;
- dividing a frequency of the initial signal by two to generate a first divided signal and a Q signal of the first divided signal;
- dividing a frequency of the initial signal by three to generate a second divided signal;
- dividing a frequency of the second divided signal by five to generate a third divided signal;
- adjusting a phase of the third divided signal to generate a quadrature (Q) signal of the third divided signal;
- and
- generating a frequency synthesized signal having a frequency which is a frequency synthesis of the first divided signal and the third divided signal, from the first divided signal and the Q signal of the first divided signal, and the third divided signal and the Q signal of the third divided signal.
4 more elements
Dependencies are inferred from the claim text.