TH30504B - A power amplifier with nested amplitude and phase mixing controls. - Google Patents

Abstract

Transmissions consisting of amplitude modulation (LAM) components and phase modulation (PM) components require a transmitter with AM and PM control bands (515,517) PM control bands to be modulated. phase frequency translation and pre-phase distortion for transmitter Pre-distortion/phase correction can be achieved by Using a frequency generator circuit (505), so the amount of PA phase correction is not limited by significance. In addition, the PM (517) control band is superimposed around the power amplifier (507) (PA) providing a PM (517) control loop. to correct for any distortion caused by PA (507).

Claims (24)

1. Transmitter for transmitting signals with amplitude modulation (AM) and phase modulation (PM). This transmitter consists of a power amplifier (PA) with input signal and input amplitude control, a power amplifier that generates an amplified PA output signal with variable phase, frequency, and amplitude, and an amplitude response to the input amplitude control, and a PM control circuit with input feedback signal, input phase reference signal, and input frequency reference signal. The PM control circuit includes a voltage-controlled frequency generator (VCO) circuit with an output signal and a control input signal. The VCO output signal is connected to the input of the power amplifier, and the input feedback signal is connected to the amplified output signal of the PA. The PM control circuit provides a phase-modified and pre-modified VCO output signal so that the phase of the PA signal responds to the input phase reference signal, and the frequency of the PA output signal responds to the frequency of the frequency reference signal. 2. The transmitter under claim 1, where the PM control circuit also comprises a mixer with first and second input signals and one output, and a phase comparator circuit with first and second input signals and one output. The first mixer input signal is connected to the PA output signal. The second mixer input signal is connected to the frequency reference signal. The output of the mixer responds to the frequency of the frequency reference signal and is connected to the first input signal of the phase comparator circuit. The second input signal of the phase comparator circuit is connected to the phase reference signal. The outer side of the phase comparator circuit responds to the phase of the phase reference signal and is connected to the VCO control input signal. 3. A transmitter that conforms to claim 1 herein has a nonlinear power amplifier circuit. 4. The transmitter, conforming to claim 1, herein has the input signal for amplitude control provided by an AM controller. The AM controller has an input signal side and an amplitude reference input signal. The input signal side of the AM controller is connected from the amplified output signal. The AM controller provides a control output side connected to the control input side of the power amplifier circuit in such a way that the variable outer amplitude of the power amplifier circuit responds to the amplitude reference input signal. 5. The transmitter, which complies with claim 1 herein, shall have its amplified output signal from the PA switchably connected to the input side of the PA's control circuit feedback signal. 6. The radio is used for transmitting radio frequency (RF) signals on a selected channel. The radio consists of: a controller to generate an amplitude reference signal, an RF carrier signal, and a phase information signal. The RF carrier signal has a frequency of one and a phase of one; the transmitter consists of: a modulator circuit whose input is connected to the phase information signal and generates a phase-modified (PM) carrier signal with a phase of two; a power amplifier (PA) circuit with an input for the information signal, a control input for the PA, and an output. The output provides the amplified and modulated PA output signal with a frequency of three and a phase of three. The frequency and phase of three respond to the input of the information signal; and an amplitude modulation (AM) controller with input one and input two. Input one is connected to the amplitude reference signal, and input two is connected to the output of the PA. The AM controller generates an amplitude control signal. Connected to the control input of the PA, the amplitude control signal determines the amplitude point of the PA output signal and responds to the amplitude reference signal; the signal mixing circuit, with one input and two inputs, the first input is connected to the radio frequency carrier wave signal, and the second input is connected to the output signal of the power amplifier circuit. The signal mixing circuit provides an output signal with a fourth frequency equal to the difference between the first and third frequencies and a fourth phase equal to the difference between the first and third phases; the phase detector, with one input and two inputs, the first input is connected to the output signal of the signal mixing circuit, and the second input is connected to the PM carrier wave signal. The phase detector provides an output signal that responds to the difference between the second and fourth phases; and the oscillator, with one input, the input is connected to the output signal of the phase detector, and the output of the oscillator is connected to the input of the data signal of the power amplifier circuit. The data signal has a phase determined by the output signal of the phase detector and responds to... The carrier wave signal, having undergone phase modulation (PM) and a frequency determined by the output signal of the phase detector, responds to the radio frequency carrier wave signal. 7. In radio, which conforms to claim number 6, the amplitude reference signal is part of the modulated signal. The modulated signal has an amplitude component and a phase component. 8. The radio, which conforms to claim number 6 herein, the carrier frequency (RF frequency) shall determine the frequency of the selected channel. 9. The radio, in accordance with claim 6 herein, shall have an output signal from the phase detector that provides a voltage that responds to the difference between the second and fourth phases. 10. The radio, which conforms to claim number 9, herein is a voltage-controlled oscillator. 11. Transmitter for signal transmission. The signal consists of amplitude modulation (AM) and phase modulation (PM). The transmitter comprises: a power amplifier circuit with signal input and amplitude control input. The power amplifier circuit generates an amplified PA output signal with a variable amplitude that responds to the amplitude control input and has a specific phase and frequency; and a PM control circuit with a phase-modified output, feedback input, modulation reference input containing information, and a frequency reference input with a specific frequency. The PM control circuit consists of a voltage-controlled oscillator (VCO) with a VCO output and a control signal. The VCO output is connected to the signal input of the power amplifier circuit. The feedback input is connected to the PA output. The PM control circuit arranges the phase-modified and distorted VCO output signal in such a way that the phase of the PA output signal responds to the information of the reference signal. The mixing of the waveform and frequency of the PA's output signal will respond to the frequency of the reference signal. 12. The transmitter, conforming to claim 11 herein, has a PM control circuit further comprising a frequency divider with first and second inputs and one output, and a phase comparator circuit with first and second inputs and one output. The first input of the frequency divider is connected to the PA output signal, and the second input of the frequency divider is connected to the modulation reference signal. The output of the frequency divider is connected to the first input of the phase comparator circuit. The second input of the phase comparator circuit is connected to the frequency reference signal. The output signal of the phase comparator circuit responds to the information content of the modulation reference signal and is connected to the VCO as a control signal. 13. A transmitter conforming to claim 12 herein has a frequency divider composed of an N-segment frequency divider. 14. A transmitter that complies with claim 12 herein contains information of the reference signal modulated into a digital signal. 15. The transmitter, conforming to claim 11 herein, has a PM control circuit that includes a frequency divider with first and second input sides and one output side; a phase comparator with first and second input sides and one output side; and an analog adder with first and second input sides and one output side. The first input of the divider is connected to the PA output signal, and the second input of the divider is connected to a numerical number representing the output signal frequency. The output of the divider is connected to the first input of the phase comparator circuit. The second input of the phase comparator circuit is connected to the frequency reference signal. The output of the phase detector is connected to the first input of the analog adder circuit. The second input of the analog adder circuit is connected to the modulation reference signal, and the output of the analog adder circuit is connected to the VCO as a control signal. 16. A transmitter conforming to claim 15 herein has a frequency divider composed of an N-segment frequency divider. 17. A transmitter that complies with claim 15 herein shall have an analog modulation reference signal. 18. A transmitter that conforms to claim 11 herein has a nonlinear power amplifier circuit. 19. The transmitter, conforming to claim 11 herein, has its control input signal for the power amplifier circuit provided by an AM controller having one signal input side and one amplitude reference input side. The signal inputs are connected from the amplified output signal. The AM controller provides a control output side connected to the control input of the power amplifier circuit in such a way that the variable amplitude output signal of the power amplifier circuit responds to the amplitude reference input signal. 20. The radio for transmitting RF signals on a selected channel consists of: a controller for generating a reference signal, a reference frequency signal, and a phase-modified (PM) signal; the PM baseband has an integer value of one, and the reference frequency signal has a first-value and a first-value phase; the transmitter consists of: a power amplifier circuit with a data signal input and a control input and one output. The output provides an amplified and modulated output signal with a second frequency and second phase, which responds to the data signal input; an amplitude modulation (AM) controller with one input and two inputs. The first input is connected to the amplitude reference signal, and the second input is connected to the output of the power amplifier circuit. The AM controller generates an amplitude control signal which is connected to the control input of the power amplifier circuit. The amplitude control signal determines the amplitude of the output signal of the power amplifier circuit and responds to the amplitude reference signal; A frequency divider, with two input sides, has its first input connected to the baseband PM signal and its second input connected to the power amplifier output. The frequency divider provides an output signal with a third frequency equal to the ratio of the second frequency to an integer and a third phase equal to the ratio of the second phase to an integer; a phase detector, with two input sides, has its first input connected to the frequency divider's output and its second input connected to the reference frequency signal. The phase detector provides an output signal that responds to the difference between the third and first phases; and an oscillator, with one input side, has its input connected to the phase detector's output. The oscillator generates an input signal which is the data signal for the power amplifier. The data signal has a frequency and phase determined by the phase detector's output and responds to the baseband PM signal. 21. In radio, which conforms to claim 20, the amplitude reference signal is part of the modulated signal; the modulated signal has an amplitude component and a phase component. 22. The radio, which conforms to claim 20 herein, has a voltage-controlled oscillator. 23. The radio frequency divider, which conforms to claim 20 herein, is composed of an N-order frequency divider. 24. A radio that complies with claim 20 here has a nonlinear power amplifier circuit. (Clause 24, 6 pages, 6 figures)