Programmable driver for frequency mixer
AssigneeHuawei Technologies Co., Ltd.
InventorsLawrence E. Connell, Kent Jaeger
Life of this patent
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Abstract
The disclosure relates to technology for shifting a frequency range of a signal. In one aspect, a circuit comprises a frequency mixer, a frequency synthesizer configured to generate an oscillator signal, a programmable driver, and a controller. The programmable driver is configured to receive the oscillator signal from the frequency synthesizer and to provide the oscillator signal to the oscillator input of the frequency mixer. The programmable driver is configured to have a variable drive strength. The controller is configured to control the drive strength of the programmable driver based on a frequency of the oscillator signal to adjust a rise time and a fall time of the oscillator signal at the oscillator input of the frequency mixer.
Claims20
A circuit for shifting a frequency range of a signal, comprising:
- a frequency mixer having a signal input, an oscillator input, and a signal output;
- a frequency synthesizer configured to generate an oscillator signal having a frequency;
- a programmable driver configured to receive the oscillator signal from the frequency synthesizer and to provide the oscillator signal to the oscillator input of the frequency mixer, the programmable driver configured to have a variable drive strength;
- and
- a controller configured to control the drive strength of the programmable driver based on the frequency of the oscillator signal to adjust a rise time and a fall time of the oscillator signal at the oscillator input of the frequency mixer.
A method of shifting a frequency range of a signal, the method comprising:
- generating an oscillator signal by a frequency synthesizer, the oscillator signal having a frequency;
- providing the oscillator signal from a programmable driver to an oscillator input of a frequency mixer, the programmable driver configured to have a variable drive strength;
- and
- controlling the drive strength of the programmable driver based on the frequency of the oscillator signal to adjust a rise time and a fall time of the oscillator signal at the oscillator input of the frequency mixer.
A radio frequency (RF) signal receiver, comprising:
- a frequency mixer having an oscillator signal input, an RF signal input, and a baseband signal output;
- an amplifier coupled to the RF signal input and configured to provide an RF signal to the frequency mixer;
- a local oscillator having a frequency synthesizer and a programmable driver coupled to the frequency synthesizer, the frequency synthesizer configured to provide an oscillator signal having a frequency to the programmable driver, the programmable driver coupled to the oscillator signal input of the frequency mixer to provide the oscillator signal to the oscillator signal input of the frequency mixer, the programmable driver configured to have a programmable drive strength to adjust a rise time and a fall time of the oscillator signal at the oscillator signal input of the frequency mixer;
- and
- a controller configured to control the drive strength of the programmable driver based on the frequency of the oscillator signal to adjust the rise time and the fall time of the oscillator signal at the oscillator signal input of the frequency mixer.
Dependencies are inferred from the claim text.