Dual mode power supply controller with charge balance multipliers and charge balance multiplier circuits
First Claim
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1. A circuit for generating an output current, comprising:
- a control signal generating circuit that is configured to generate a control signal, wherein the control signal is a function of a level of an analog input voltage signal and wherein an average level of the output current is a function of a level of a varying analog input current signal and the level of the analog input voltage signal; and
a switched current source that is controlled by the control signal and configured to generate the output current with a duty cycle corresponding to the control signal and having a peak level equal to the level of the varying analog input current signal, wherein the duty cycle of the control signal is proportional to the level of the analog input voltage signal.
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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
21 Claims
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1. A circuit for generating an output current, comprising:
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a control signal generating circuit that is configured to generate a control signal, wherein the control signal is a function of a level of an analog input voltage signal and wherein an average level of the output current is a function of a level of a varying analog input current signal and the level of the analog input voltage signal; and a switched current source that is controlled by the control signal and configured to generate the output current with a duty cycle corresponding to the control signal and having a peak level equal to the level of the varying analog input current signal, wherein the duty cycle of the control signal is proportional to the level of the analog input voltage signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A circuit for generating an output current, comprising:
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a control signal generating circuit that generates a control signal in response to an analog input voltage; a switched current source that generates the output current in response to the control signal and a variable analog input current signal; and a balance capacitor coupled to an output of the switched current source; wherein a duty cycle of the control signal is proportional to a level of the analog input voltage signal; and wherein a level of the output current is proportional to a product of the variable analog input current signal and the analog input voltage; an output current mirror coupled to the balance capacitor; wherein the balance capacitor is charged by a current output by the switched current source and is discharged through the output current mirror. - View Dependent Claims (20)
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21. A circuit for generating an output current, comprising:
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a control signal generating circuit including a comparator configured to receive an analog input voltage signal and a ramp voltage and to generate a control signal in response to the analog input voltage signal and the ramp voltage; and a switched current source that generates the output current in response to the control signal and a varying analog input current signal, wherein the current output by the switched current source is formed from the varying analog input current signal and has a duty cycle that corresponds to a duty cycle of the control signal; wherein the duty cycle of the control signal is proportional to a level of the analog input voltage signal; and wherein a level of the output current is proportional to a product of the varying analog input current signal and the analog input voltage signal; wherein the circuit further comprises; a balance capacitor coupled to an output of the switched current source; and an output current mirror coupled to the balance capacitor; wherein the balance capacitor is charged by the current output by the switched current source and is discharged through the output current mirror.
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Specification