RF stacked power amplifier bias method
First Claim
1. A RF stacked power amplifier, comprising:
- a voltage-dividing circuit, receiving a system voltage and dividing the system voltage so as to output a first reference partial voltage and a second reference partial voltage;
a negative feedback bias circuit, electrically connected to the voltage-dividing circuit so as to receive the second reference partial voltage, the negative feedback bias circuit receiving a negative feedback reference voltage and correspondingly outputting a second bias reference voltage according to a result of comparing the second reference partial voltage and the negative feedback reference voltage;
a current source circuit, electrically connected to the voltage-dividing circuit so as to receive the first reference partial voltage, the current source circuit determining a bias reference current according to the first reference partial voltage; and
a stacked amplifying circuit, electrically connected to the current source circuit and the negative feedback bias circuit, the stacked amplifying circuit outputting the negative feedback reference voltage and determining an operation bias point according to a first bias reference voltage and the bias reference current;
wherein in AC mode the stacked amplifying circuit receives and amplifies a RF input signal and correspondingly outputs a RF output signal.
1 Assignment
0 Petitions
Accused Products
Abstract
The RF stacked power amplifier comprises a voltage-dividing circuit, a negative feedback bias circuit, a current source circuit and a stacked amplifying circuit. The voltage-dividing circuit receives a system voltage and divides the system voltage for outputting a first reference partial voltage and a second reference partial voltage. The negative feedback bias circuit receives a negative feedback reference voltage and correspondingly outputs a second bias reference voltage according to a result of comparing the second reference partial voltage and the negative feedback reference voltage. The current source circuit determines a bias reference current according to the first reference partial voltage. The stacked amplifying circuit outputs the negative feedback reference voltage and determines an operation bias point according to a first bias reference voltage and the bias reference current. The RF stacked power amplifier makes the voltage-drop and the power consumption of each transistor equal via the voltage-dividing circuit.
32 Citations
12 Claims
-
1. A RF stacked power amplifier, comprising:
-
a voltage-dividing circuit, receiving a system voltage and dividing the system voltage so as to output a first reference partial voltage and a second reference partial voltage; a negative feedback bias circuit, electrically connected to the voltage-dividing circuit so as to receive the second reference partial voltage, the negative feedback bias circuit receiving a negative feedback reference voltage and correspondingly outputting a second bias reference voltage according to a result of comparing the second reference partial voltage and the negative feedback reference voltage; a current source circuit, electrically connected to the voltage-dividing circuit so as to receive the first reference partial voltage, the current source circuit determining a bias reference current according to the first reference partial voltage; and a stacked amplifying circuit, electrically connected to the current source circuit and the negative feedback bias circuit, the stacked amplifying circuit outputting the negative feedback reference voltage and determining an operation bias point according to a first bias reference voltage and the bias reference current; wherein in AC mode the stacked amplifying circuit receives and amplifies a RF input signal and correspondingly outputs a RF output signal. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A bias method, used in a RF stacked power amplifier, the RF stacked power amplifier comprising a voltage-dividing circuit, a negative feedback bias circuit, a current source circuit and a stacked amplifying circuit, the negative feedback bias circuit electrically connected to the voltage-dividing circuit, the current source circuit electrically connected to the voltage-dividing circuit, and the stacked amplifying circuit electrically connected to the current source circuit and the negative feedback bias circuit, the bias method comprising:
-
receiving a system voltage via the voltage-dividing circuit, dividing the system voltage and outputting a first reference partial voltage and a second reference partial voltage; receiving a negative feedback reference voltage and correspondingly outputting a second bias reference voltage according to a result of comparing the second reference partial voltage and the negative feedback reference voltage via the negative feedback bias circuit; determining a bias reference current according to the first reference partial voltage via the current source circuit; and outputting the negative feedback reference voltage via the stacked amplifying circuit and determining an operation bias point according to a first bias reference voltage and the bias reference current wherein in AC mode the stacked amplifying circuit receives and amplifies a RF input signal and correspondingly outputs a RF output signal. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification