초록 ▼

A method of generating a slope compensation signal for use in a current mode switching regulator. The method includes the steps of summing a clock signal and a reference signal so as to generate a linear ramp signal; generating a non-linear signal from the linear ramp signal; multiplying a correctio

A method of generating a slope compensation signal for use in a current mode switching regulator. The method includes the steps of summing a clock signal and a reference signal so as to generate a linear ramp signal; generating a non-linear signal from the linear ramp signal; multiplying a correction signal with an input voltage signal so as to generate a signal which varies based on a measured value of a current flowing within the current mode switching regulator; summing a first voltage signal corresponding to the non-linear correction signal and a second voltage signal indicating the difference between an actual voltage level of the current mode switching regulator and the desired voltage level of the current mode switching regulator so as to generate a first output signal which represents the second voltage signal minus the first voltage signal; and comparing the first output signal and the measured value of a current flowing within the current mode switching regulator, and generating a second output signal utilized to control current flow within the current mode switching regulator based on the result of the comparison.

대표청구항 ▼

What is claimed is: 1. A slope compensation circuit for use in a current mode switching regulator, said slope compensation circuit comprising: a first summer circuit for receiving a clock signal and a reference signal as input signals, and for generating a linear signal as an output signal; a multi

What is claimed is: 1. A slope compensation circuit for use in a current mode switching regulator, said slope compensation circuit comprising: a first summer circuit for receiving a clock signal and a reference signal as input signals, and for generating a linear signal as an output signal; a multiplier and integrator circuit for multiplying said linear signal with an input voltage signal, and integrating the result for generating a non-linear signal which varies based on a measured value of a current flowing within said current mode switching regulator; a second summer circuit for receiving a first voltage signal corresponding to said non-linear signal and a second voltage signal indicating the difference between an actual voltage level of said current mode switching regulator and the desired voltage level of said current mode switching regulator, and for generating a first output signal which represents the second voltage signal minus the first voltage signal; and a comparator for receiving the first output signal from said second summer as a first input, and said measured value of a current flowing within said current mode switching regulator as a second input, and for generating a second output signal utilized to control current flow within said current mode switching regulator. 2. The slope compensation circuit of claim 1, wherein the only measured signals utilized by the slope compensation circuit include the current flowing through a high-side switch contained in said current mode switching regulator and the output voltage level of said current mode switching regulator. 3. The slope compensation circuit of claim 1, further comprising a transconductance amplifier for coupling said multiplier and integrator circuit to said second summer circuit, said transconductance amplifier operative for generating a current signal based on the output of said multiplier and integrator circuit. 4. The slope compensation circuit of claim 1, further comprising a first transconductance amplifier for coupling said first summer circuit to said multiplier and integrator circuit, and a second transconductance amplifier for coupling said reference signal to said multiplier and integrator circuit, said first transconductance amplifier and said second transconductance amplifier operate as voltage to current converters. 5. The slope compensation circuit of claim 1, wherein said input voltage signal corresponds to the input voltage of said current mode switching regulator. 6. The slope compensation circuit of claim 1, wherein current flowing within said current mode switching regulator corresponds to current flow through a high-side switch contained in said current mode switching regulator. 7. The slope compensation circuit of claim 1, wherein said actual voltage level of said current mode switching regulator corresponds to an output voltage of said current mode switching regulator. 8. The slope compensation circuit of claim 1, wherein said multiplier and integrator circuit only generates an output for positive input signals. 9. A current mode switching regulator for regulating an output voltage, said current mode switching regulator comprising: a switch; a controller coupled to said switch, said controller governing the operational state of said switch so as to control current flow to a load; and a slope compensation circuit; said slope compensation circuit including: a first summer circuit for receiving a clock signal and a reference signal as input signals, and for generating a linear signal as an output signal; a multiplier and integrator circuit for multiplying said linear signal with an input voltage signal, and integrating the result for generating a non-linear signal which varies based on a measured value of a current flowing within said switch; a second summer circuit for receiving a first voltage signal corresponding to said non-linear signal and a second voltage signal indicating the difference between an actual voltage level of said current mode switching regulator and the desired voltage level of said current mode switching regulator, and for generating a first output signal which represents the second voltage signal minus the first voltage signal; and a comparator for receiving the first output signal from said second summer as a first input, and said measured value of a current flowing within said switch regulator as a second input, and for generating a second output signal utilized to control current flow through said switch. 10. The current mode switching regulator of claim 9, wherein the only measured signals utilized by the slope compensation circuit include the current flowing through the switch and the output voltage level of said current mode switching regulator. 11. The current mode switching regulator of claim 9, wherein said slope compensation circuit further comprises a transconductance amplifier for coupling said multiplier and integrator circuit to said second summer circuit, said transconductance amplifier operative for generating a current signal based on the output of said multiplier and integrator circuit. 12. The current mode switching regulator of claim 9, wherein said slope compensation circuit further comprises a first transconductance amplifier for coupling said first summer circuit to said multiplier and integrator circuit, and a second transconductance amplifier for coupling said reference signal to said multiplier and integrator circuit, said first transconductance amplifier and said second transconductance amplifier operate as voltage to current converters. 13. The current mode switching regulator of claim 9, wherein said input voltage signal corresponds to the input voltage of said current mode switching regulator. 14. The current mode switching regulator of claim 9, wherein said actual voltage level of said current mode switching regulator corresponds to an output voltage of said current mode switching regulator. 15. A method of generating a slope compensation signal for use in a current mode switching regulator, said method comprising the steps of: summing a clock signal and a reference signal so as to generate a linear ramp signal; multiplying said linear ramp signal with an input voltage signal so as to generate a scaled signal which varies based on a measured value of a current flowing within said current mode switching regulator; integrating the linear scaled signal with respect to time to generate a non-linear ramp signal; summing a first voltage signal corresponding to said non-linear signal and a second voltage signal indicating the difference between an actual voltage level of said current mode switching regulator and the desired voltage level of said current mode switching regulator so as to generate a first output signal which represents the second voltage signal minus the first voltage signal; and comparing the first output signal and said measured value of a current flowing within said current mode switching regulator, and generating a second output signal utilized to control current flow within said current mode switching regulator based on the result of said comparison. 16. The method of claim 15, wherein the only measured signals utilized are the current flowing through a high-side switch contained in said current mode switching regulator and the output voltage level of said current mode switching regulator. 17. The method of claim 15, wherein said input voltage signal corresponds to the input voltage of said current mode switching regulator. 18. The method of claim 15, wherein current flowing within said current mode switching regulator corresponds to current flow through a high-side switch contained in said current mode switching regulator. 19. The method of claim 15, wherein said actual voltage level of said current mode switching regulator corresponds to an output voltage of said current mode switching regulator.