Apparatus and methods for using tuning information to adaptively and dynamically modify the parameters of an RF signal chain
View Patent ↗Provided herein are apparatus and methods for using tuning information to adaptively and dynamically modify the parameters of an RF signal chain. The tuning information from an oscillator core, having multiple oscillators, adaptively tunes parameters of system components within a signal chain. In this way the system components are tuned to operate within a band tailored to the signal and to the oscillator core. In addition, RF impedances can be matched and power added efficiency can be enhanced in an area efficient monolithic integrated circuit.
1. A radio frequency apparatus having wide-tuning-frequency capabilities, the apparatus comprising:
a multi-core voltage controlled oscillator, wherein the multi-core voltage controlled oscillator is configured to provide output signals having a plurality of frequency bands, and wherein the multi-core voltage controlled oscillator includes:
a first voltage controlled oscillator having a first tuning unit configured to receive a plurality of control signals, wherein the plurality of control signals tune a frequency range of the first voltage controlled oscillator; and
a second voltage controlled oscillator having a second tuning unit configured to receive the plurality of control signals, wherein the plurality of control signals tune a frequency range of the second voltage controlled oscillator;
a radio frequency component configured to receive the plurality of control signals, wherein the plurality of control signals tune a characteristic of the radio frequency component, and wherein the plurality of control signals selects a select output signal from the output signals having the plurality of frequency bands; and
a frequency multiplier configured to multiply a frequency of the select output signal in response to the control signals.
2. The radio frequency apparatus of claim 1 ,
wherein an output signal frequency of the first voltage controlled oscillator is tuned by a tuning voltage such that the output signal frequency of the first voltage controlled oscillator is a frequency of the frequency range of the first voltage controlled oscillator; and
wherein an output signal frequency of the second voltage controlled oscillator is tuned by a tuning voltage such that the output signal frequency of the second voltage controlled oscillator is a frequency of the frequency range of the second voltage controlled oscillator.
3. The radio frequency apparatus of claim 2 , further comprising a multiplexer;
wherein the multiplexer is configured to pass a select one of the output signal of the first voltage controlled oscillator and the output signal of the second voltage controlled oscillator based on the control signals.
4. The radio frequency apparatus of claim 3 ,
wherein a local oscillator filter receives the select one of the output signal of the first voltage controlled oscillator and the output signal of the second voltage controlled oscillator; and
wherein the radio frequency component is the local oscillator filter and the characteristic is a frequency band of the local oscillator filter.
5. The radio frequency apparatus of claim 1 ,
wherein the radio frequency component is a radio frequency power amplifier and the characteristic is an input impedance of the radio frequency power amplifier; and
wherein the input impedance of the radio frequency power amplifier is controlled by the plurality of control signals to be a matched impedance of the radio frequency apparatus.
6. The radio frequency apparatus of claim 1 ,
wherein the radio frequency component is a radio frequency power amplifier and the characteristic is an output impedance of the radio frequency power amplifier; and
wherein the output impedance of the radio frequency power amplifier is controlled by the plurality of control signals to be a matched impedance of the radio frequency apparatus.
7. The radio frequency apparatus of claim 1 , wherein the radio frequency component is a radio frequency power amplifier and the characteristic is a frequency band of the radio frequency power amplifier.
8. The radio frequency apparatus of claim 7 , wherein the radio frequency power amplifier is configured as a narrow band amplifier.
9. The radio frequency apparatus of claim 1 , wherein the radio frequency component is a band pass filter and the characteristic is a frequency band of the band pass filter.
10. The radio frequency apparatus of claim 1 , wherein the radio frequency apparatus is part of a monolithic integrated circuit.
11. A radio frequency apparatus having wide-tuning-frequency capabilities, the apparatus comprising:
a multi-core voltage controlled oscillator, wherein the multi-core voltage controlled oscillator is configured to provide output signals having a plurality of frequency bands, and wherein the multi-core voltage controlled oscillator includes a plurality of voltage controlled oscillators each having a tuning unit configured to receive a plurality of control signals and a tuning voltage, wherein the control signals are configured to tune a frequency range of each of the plurality of voltage controlled oscillators, and wherein the tuning voltage is configured tune an output signal frequency of each of the plurality of voltage controlled oscillators;
a radio frequency component configured to receive the plurality of control signals, wherein the plurality of control signals tune a characteristic of the radio frequency component and selects a select output signal from the output signals having the plurality of frequency bands; and
a frequency multiplier configured to multiply a frequency of the select output signal in response to the control signals.
12. The radio frequency apparatus of claim 11 , further comprising a multiplexer;
wherein the multiplexer is configured to pass a select one of the output signals of the plurality of voltage controlled oscillators based on the control signals.
13. The radio frequency apparatus of claim 12 ,
wherein the frequency multiplier comprises a tracking filter;
wherein the tracking filter receives the select one of the output signals of the plurality of voltage controlled oscillators; and
wherein the radio frequency component is the tracking filter and the characteristic is a frequency band of the tracking filter.
14. The radio frequency apparatus of claim 11 ,
wherein the radio frequency component is a radio frequency power amplifier and the characteristic is an input impedance of the radio frequency power amplifier; and
wherein the input impedance of the radio frequency power amplifier is controlled by the plurality of control signals to be a matched impedance of the radio frequency apparatus.
15. The radio frequency apparatus of claim 11 ,
wherein the radio frequency component is a radio frequency power amplifier and the characteristic is an output impedance of the radio frequency power amplifier; and
wherein the output impedance of the radio frequency power amplifier is controlled by the plurality of control signals to be a matched impedance of the radio frequency apparatus.
16. The radio frequency apparatus of claim 11 , wherein the radio frequency component is a radio frequency power amplifier and the characteristic is a frequency band of the radio frequency power amplifier.
17. The radio frequency apparatus of claim 16 , wherein the radio frequency power amplifier is configured as a narrow band amplifier.
18. The radio frequency apparatus of claim 11 , wherein the radio frequency component is a band pass filter and the characteristic is a frequency band of the band pass filter.
19. The radio frequency apparatus of claim 11 , wherein the radio frequency apparatus is part of a monolithic integrated circuit.
20. A method of operating a radio frequency apparatus having wide-tuning-frequency capabilities comprising:
calibrating a multi-core voltage controlled oscillator using a control vector of signals determined by a control loop;
applying the control vector of signals to a multiplexer to pass a select output from a plurality of output signals having a plurality of frequency bands from the multi-core voltage controlled oscillator;
applying the control vector of signals to at least one filter to adjust a filter characteristic of the at least one filter; and
applying the control vector of signals to at least one amplifier to adjust a characteristic of the at least one amplifier, wherein the characteristic of the at least one amplifier includes an input impedance, an output impedance, and a power gain.
21. The method of claim 20 further comprising:
applying the control vector of signals to the multiplexer to pass the select output from the plurality of output signals from the multi-core voltage controlled oscillator.