Orthogonal signal generator and method thereof, phase shifter and method thereof, and amplifying device

An orthogonal signal generator, comprising:

• a first stage phase shifting circuit and a second stage phase shifting circuit;
• an output end of the first stage phase shifting circuit being connected with an input end of the second stage phase shifting circuit, an impedance of the first stage phase shifting circuit being adjustable based on a frequency of a first input signal, and the first stage phase shifting circuit being configured to phase-shift the first input signal by a first phase shifting angle and generate a first phase shifting angle signal;
• an impedance of the second stage phase shifting circuit being adjustable based on a frequency of a second input signal, the second stage phase shifting circuit being configured to phase-shift the phase-shifted second input signal by a second phase shifting angle and output an orthogonal signal with a corresponding frequency;
• wherein the first stage phase shifting circuit comprises a first resistor sub-circuit and a first capacitor sub-circuit;
• and/or the second stage phase shifting circuit comprises a second resistor sub-circuit and a second capacitor sub-circuit;
• the first stage phase shifting circuit is configured to adjust an equivalent capacitance of the first capacitor sub-circuit and/or an equivalent resistance of the first resistor sub-circuit based on the frequency of the first input signal;
• the second stage phase shifting circuit is configured to adjust an equivalent capacitance of the second capacitor sub-circuit and/or an equivalent resistance of the second resistor sub-circuit based on the frequency of the second input signal;
• wherein the first stage phase shifting circuit is configured to generate the first phase shifting angle signal based on a first delay constant which is a product of the equivalent capacitance of the first capacitor sub-circuit and the equivalent resistance of the first resistor sub-circuit;
• and/or the second stage phase shifting circuit is configured to generate the orthogonal signal with a corresponding frequency based on a second delay constant which is a product of the equivalent capacitance of the second capacitor sub-circuit and the equivalent resistance of the second resistor sub-circuit.

A phase shifter, comprising:

• an adder, a controller, and an orthogonal signal generator comprising:
• a first stage phase shifting circuit and a second stage phase shifting circuit;
• an output end of the first stage phase shifting circuit being connected with an input end of the second stage phase shifting circuit, an impedance of the first stage phase shifting circuit being adjustable based on a frequency of a first input signal, and the first stage phase shifting circuit being configured to phase-shift the first input signal by a first phase shifting angle and generate a first phase shifting angle signal;
• an impedance of the second stage phase shifting circuit being adjustable based on a frequency of a second input signal, the second stage phase shifting circuit being configured to phase-shift the phase-shifted second input signal by a second phase shifting angle and output an orthogonal signal with a corresponding frequency:
• an output end of the controller being respectively connected with an input end of the orthogonal signal generator and a first input end of the adder;
• and the controller being configured to generate a first control signal based on a frequency of an input radio frequency signal and to generate a second control signal based on a target phase shifting angle;
• the first control signal being used for controlling the orthogonal signal generator, and the second control signal being used for controlling the adder;
• and
• an output end of the orthogonal signal generator being connected with a second input end of the adder, and the orthogonal signal generator being configured to generate an orthogonal signal with a corresponding frequency based on the first control signal.

A method for generating an orthogonal signal, applied to an orthogonal signal generator comprising:

• a first stage phase shifting circuit and a second stage phase shifting circuit;
• an output end of the first stage phase shifting circuit being connected with an input end of the second stage phase shifting circuit, an impedance of the first stage phase shifting circuit being adjustable based on a frequency of a first input signal, and the first stage phase shifting circuit being configured to phase-shift the first input signal by a first phase shifting angle and generate a first phase shifting angle signal;
• an impedance of the second stage phase shifting circuit being adjustable based on a frequency of a second input signal, the second stage phase shifting circuit being configured to phase-shift the phase-shifted second input signal by a second phase shifting angle and output an orthogonal signal with a corresponding frequency;
• the method comprising
• adjusting a circuit impedance of the first stage phase shifting circuit by the first stage phase shifting circuit based on the frequency of the first input signal, and phase-shifting the first input signal by the first phase shifting angle to output the first phase shifting angle signal;
• adjusting a circuit impedance of the second stage phase shifting circuit by the second stage phase shifting circuit based on the frequency of the second input signal, and phase-shifting the phase-shifted second input signal by the second phase shifting angle to output the orthogonal signal with the corresponding frequency.