Dual mode power supply controller with charge balance multipliers and charge balance multiplier circuits
First Claim
Patent Images
1. A power conversion circuit, comprising:
- a voltage boost circuit including a boost inductor, the voltage boost circuit being configured to generate an output voltage in response to an input voltage; and
a boost controller configured to control operation of the voltage boost circuit;
wherein the boost controller is configured to generate an error signal by multiplying a current signal and a voltage signal; and
wherein the power conversion circuit further comprises a multiplier circuit for multiplying the current signal by the voltage signal, the multiplier circuit comprising;
a switched current source that is controlled by a control signal;
a control signal generating circuit that is configured to generate the control signal, wherein a duty cycle of the control signal is proportional to a level of the voltage signal; and
a balance capacitor coupled to the switched current source;
wherein a level of output current output by the multiplier circuit is proportional to a product of a level of the current signal and the level of the voltage signal;
the power conversion circuit further comprising;
an output current mirror coupled to the balance capacitor;
wherein the switched current source receives the current signal as an input; and
wherein the balance capacitor is charged by the switched current source with the duty cycle corresponding to the control signal and is discharged through the output current mirror.
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Abstract
A circuit for generating an output current includes a control signal generating circuit that is configured to generate a control signal. The control signal is a function of a level of an analog input voltage signal, and a level of the output current is a function of a level of an analog input current signal and the level of the analog input voltage signal.
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Citations
9 Claims
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1. A power conversion circuit, comprising:
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a voltage boost circuit including a boost inductor, the voltage boost circuit being configured to generate an output voltage in response to an input voltage; and a boost controller configured to control operation of the voltage boost circuit; wherein the boost controller is configured to generate an error signal by multiplying a current signal and a voltage signal; and wherein the power conversion circuit further comprises a multiplier circuit for multiplying the current signal by the voltage signal, the multiplier circuit comprising; a switched current source that is controlled by a control signal; a control signal generating circuit that is configured to generate the control signal, wherein a duty cycle of the control signal is proportional to a level of the voltage signal; and a balance capacitor coupled to the switched current source; wherein a level of output current output by the multiplier circuit is proportional to a product of a level of the current signal and the level of the voltage signal; the power conversion circuit further comprising; an output current mirror coupled to the balance capacitor; wherein the switched current source receives the current signal as an input; and wherein the balance capacitor is charged by the switched current source with the duty cycle corresponding to the control signal and is discharged through the output current mirror. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power conversion circuit, comprising:
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a voltage boost circuit including a boost inductor, the voltage boost circuit being configured to generate an output voltage in response to an input voltage; and a boost controller configured to control operation of the voltage boost circuit; wherein the boost controller is configured to generate an error signal by multiplying a current signal and a voltage signal; and wherein the power conversion circuit further comprises a multiplier circuit for multiplying the current signal by the voltage signal, the multiplier circuit comprising; a switched current source that is controlled by a control signal; a control signal generating circuit that is configured to generate the control signal, wherein a duty cycle of the control signal is proportional to a level of the voltage signal; and a balance capacitor coupled to the switched current source; wherein a level of output current output by the multiplier circuit is proportional to a product of a level of the current signal and the level of the voltage signal; wherein the power conversion circuit further comprises; an output current mirror coupled to the balance capacitor; wherein the switched current source receives an analog input current signal as an input; and wherein the balance capacitor is charged by a current output by the switched current source and is discharged through the output current mirror.
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9. A power conversion circuit, comprising:
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a voltage boost circuit including a boost inductor, the voltage boost circuit being configured to generate an output voltage in response to an input voltage; and a boost controller configured to control operation of the voltage boost circuit; wherein the boost controller is configured to generate an error signal by multiplying a current signal and a voltage signal; and wherein the power conversion circuit further comprises a multiplier circuit for multiplying the current signal by the voltage signal, the multiplier circuit comprising; a switched current source that is controlled by a control signal; a control signal generating circuit that is configured to generate the control signal, wherein a duty cycle of the control signal is proportional to a level of the voltage signal; and a balance capacitor coupled to the switched current source; wherein a level of output current output by the multiplier circuit is proportional to a product of a level of the current signal and the level of the voltage signal; wherein the switched current source receives a reference current as an input, and wherein the balance capacitor is charged by an analog input current signal and is discharged by the switched current source.
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Specification