High-speed closed-loop switch-mode boost converter

A closed-loop switch-mode boost converter comprising:

• a switching signal generator circuit for generating a switching signal, the switching signal generator circuit comprising a signal input node for receiving a time-varying input signal, and a switching signal output node for outputting the switching signal, a duty-cycle of the switching signal having a first non-linear relationship to an amplitude of the time-varying input signal;
• a switch-mode boost amplifier (“amplifier”) circuit comprising an input voltage node for receiving an input voltage, a switch driver input node coupled to the switching signal output node for receiving the switching signal, and a signal output node for outputting a time-varying output signal, an amplitude of the time-varying output signal having a second non-linear relationship to the duty-cycle of the switching signal, and the time-varying output signal having a linear relationship to the time-varying input signal based on the first non-linear relationship and the second non-linear relationship;
• a filter circuit with a filter input node coupled to the signal output node of the amplifier circuit to receive the time-varying output signal, and a filter output node for outputting a filtered time-varying output signal;
• and
• an error amplifier circuit having a first input node coupled to the signal input node for receiving the time-varying input signal, and a second input node coupled to the filter output node of the amplifier circuit to receive the filtered time-varying output signal, the error amplifier circuit producing a feedback control signal using the time-varying input signal and the filtered time-varying output signal, the filtered time-varying output signal being adjusted based on the feedback control signal;
• wherein:
• the time-varying input signal has a first maximum frequency component, the first maximum frequency component being substantially greater than DC;
• and
• the filtered time-varying output signal has a second maximum frequency component, the second maximum frequency component being substantially the same as the first maximum frequency component.