Systems and methods for high precision and/or low loss regulation of output currents of power conversion systems
First Claim
1. An error amplifier for processing a reference signal and an input signal associated with a current of a power conversion system, the error amplifier comprising:
- a first operational amplifier including a first input terminal, a second input terminal and a first output terminal, the first input terminal being configured to receive a reference signal;
a first transistor including a first transistor terminal, a second transistor terminal and a third transistor terminal, the first transistor terminal being configured to receive a first amplified signal from the first output terminal, the third transistor terminal being coupled to the second input terminal;
a second operational amplifier including a third input terminal, a fourth input terminal and a second output terminal, the third input terminal being configured to receive an input signal associated with a first current flowing through a primary winding of a power conversion system;
a second transistor including a fourth transistor terminal, a fifth transistor terminal and a sixth transistor terminal, the fourth transistor terminal being configured to receive a second amplified signal from the second output terminal, the sixth transistor terminal being coupled to the fourth input terminal;
a current mirror component including a first component terminal and a second component terminal, the first component terminal being coupled to the second transistor terminal;
a switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the second component terminal, the second switch terminal being coupled to the fifth transistor terminal;
a first resistor including a first resistor terminal and a second resistor terminal, the first resistor being associated with a first resistance, the first resistor terminal being coupled to the second input terminal; and
a second resistor including a third resistor terminal and a fourth resistor terminal, the second resistor being associated with a second resistance, the third resistor terminal being coupled to the fourth input terminal;
wherein;
the first resistance is larger than the second resistance in magnitude; and
the second component terminal is configured to output a first output signal based on at least information associated with the reference signal and the input signal.
1 Assignment
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Accused Products
Abstract
Systems and methods are provided for signal processing. An example error amplifier for processing a reference signal and an input signal associated with a current of a power conversion system includes a first operational amplifier, a second operational amplifier, a first transistor, a second transistor, a current mirror component, a switch, a first resistor and a second resistor. The first operational amplifier includes a first input terminal, a second input terminal and a first output terminal, the first input terminal being configured to receive a reference signal. The first transistor includes a first transistor terminal, a second transistor terminal and a third transistor terminal, the first transistor terminal being configured to receive a first amplified signal from the first output terminal, the third transistor terminal being coupled to the second input terminal.
116 Citations
14 Claims
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1. An error amplifier for processing a reference signal and an input signal associated with a current of a power conversion system, the error amplifier comprising:
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a first operational amplifier including a first input terminal, a second input terminal and a first output terminal, the first input terminal being configured to receive a reference signal; a first transistor including a first transistor terminal, a second transistor terminal and a third transistor terminal, the first transistor terminal being configured to receive a first amplified signal from the first output terminal, the third transistor terminal being coupled to the second input terminal; a second operational amplifier including a third input terminal, a fourth input terminal and a second output terminal, the third input terminal being configured to receive an input signal associated with a first current flowing through a primary winding of a power conversion system; a second transistor including a fourth transistor terminal, a fifth transistor terminal and a sixth transistor terminal, the fourth transistor terminal being configured to receive a second amplified signal from the second output terminal, the sixth transistor terminal being coupled to the fourth input terminal; a current mirror component including a first component terminal and a second component terminal, the first component terminal being coupled to the second transistor terminal; a switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the second component terminal, the second switch terminal being coupled to the fifth transistor terminal; a first resistor including a first resistor terminal and a second resistor terminal, the first resistor being associated with a first resistance, the first resistor terminal being coupled to the second input terminal; and a second resistor including a third resistor terminal and a fourth resistor terminal, the second resistor being associated with a second resistance, the third resistor terminal being coupled to the fourth input terminal; wherein; the first resistance is larger than the second resistance in magnitude; and the second component terminal is configured to output a first output signal based on at least information associated with the reference signal and the input signal. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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2. An error amplifier for processing a reference signal and an input signal associated with a current of a power conversion system, the error amplifier comprising:
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a first operational amplifier including a first input terminal, a second input terminal and a first output terminal, the first input terminal being configured to receive a reference signal; a first transistor including a first transistor terminal, a second transistor terminal and a third transistor terminal, the first transistor terminal being configured to receive a first amplified signal from the first output terminal, the third transistor terminal being coupled to the second input terminal; a second operational amplifier including a third input terminal, a fourth input terminal and a second output terminal, the third input terminal being configured to receive an input signal associated with a current flowing through a primary winding of a power conversion system; a second transistor including a fourth transistor terminal, a fifth transistor terminal and a sixth transistor terminal, the fourth transistor terminal being configured to receive a second amplified signal from the second output terminal, the sixth transistor terminal being coupled to the fourth input terminal; a current mirror component including a first component terminal and a second component terminal, the first component terminal being coupled to the second transistor terminal; a switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the second component terminal, the second switch terminal being coupled to the fifth transistor terminal; a first resistor including a first resistor terminal and a second resistor terminal, the first resistor being associated with a first resistance, the first resistor terminal being coupled to the second input terminal; and a second resistor including a third resistor terminal and a fourth resistor terminal, the second resistor being associated with a second resistance, the third resistor terminal being coupled to the fourth input terminal; wherein; the first resistance is larger than the second resistance in magnitude; and the second component terminal is configured to output an output signal based on at least information associated with the reference signal and the input signal; wherein the second operational amplifier is configured to receive a clock signal, and change the second amplified signal at the second output terminal in response to the clock signal.
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14. An error amplifier for processing a reference signal and an input signal associated with a current of a power conversion system, the error amplifier comprising:
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a first operational amplifier including a first input terminal, a second input terminal and a first output terminal, the first input terminal being configured to receive a reference signal; a first transistor including a first transistor terminal, a second transistor terminal and a third transistor terminal, the first transistor terminal being configured to receive a first amplified signal from the first output terminal, the third transistor terminal being coupled to the second input terminal; a second operational amplifier including a third input terminal, a fourth input terminal and a second output terminal, the third input terminal being configured to receive an input signal associated with a current flowing through a primary winding of a power conversion system; a second transistor including a fourth transistor terminal, a fifth transistor terminal and a sixth transistor terminal, the fourth transistor terminal being configured to receive a second amplified signal from the second output terminal, the sixth transistor terminal being coupled to the fourth input terminal; a current mirror component including a first component terminal and a second component terminal, the first component terminal being coupled to the second transistor terminal; a switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the second component terminal, the second switch terminal being coupled to the fifth transistor terminal; a first resistor including a first resistor terminal and a second resistor terminal, the first resistor being associated with a first resistance, the first resistor terminal being coupled to the second input terminal; and a second resistor including a third resistor terminal and a fourth resistor terminal, the second resistor being associated with a second resistance, the third resistor terminal being coupled to the fourth input terminal; wherein; the first resistance is larger than the second resistance in magnitude; and the second component terminal is configured to output an output signal based on at least information associated with the reference signal and the input signal; wherein; the current mirror component includes a third transistor including a seventh transistor terminal, an eighth transistor terminal and a ninth transistor terminal and a fourth transistor including a tenth transistor terminal, an eleventh transistor terminal and a twelfth transistor terminal; the seventh transistor terminal is coupled to the ninth transistor terminal and the tenth transistor terminal; the eighth transistor terminal is coupled to the eleventh transistor terminal; and the ninth transistor terminal is coupled to the second transistor terminal; wherein; the current mirror component further includes a fifth transistor including a thirteenth transistor terminal, a fourteenth transistor terminal and a fifteenth transistor terminal and a third operational amplifier including a fifth input terminal, a sixth input terminal and a third output terminal; the thirteenth transistor terminal is coupled to the third output terminal; the fourteenth transistor terminal is coupled to the twelfth transistor terminal and the fifth input terminal; the fifteenth transistor terminal is coupled to the first switch terminal; and the sixth input terminal is coupled to the ninth transistor terminal and the second transistor terminal.
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Specification