Amplification systems and methods with one or more channels

A system for amplifying one or more input signals to generate one or more output signals, the system comprising:

• an oscillator configured to generate a ramp signal associated with a ramping frequency;
• and
• a comparator configured to receive the ramp signal and generate one or more comparison signals based at least in part on the ramp signal;
• wherein the oscillator is further configured to:
• change the ramping frequency pseudo-randomly so that one or more changes in the ramping frequency are made in a pseudo-random-jittering period corresponding to a pseudo-random-jittering frequency;
• and
• wherein the pseudo-random-jittering frequency is smaller than a lower limit of a predetermined audio frequency range.

A system for amplifying one or more input signals to generate one or more output signals, the system comprising:

• an oscillator configured to generate a ramp signal associated with a ramping frequency;
• and
• a comparator configured to receive the ramp signal and generate one or more comparison signals based at least in part on the ramp signal;
• wherein the oscillator includes:
• a first current source configured to provide a discharging current;
• a second current source configured to provide a charging current;
• a capacitor configured to be charged in response to the charging current and be discharged in response to the discharging current, the ramp signal being associated with a voltage related to the capacitor;
• a transconductance amplifier configured to receive an input current associated with the charging current or the discharging current and output the ramp signal based on at least information associated with the input current;
• and
• a jittering-sequence generator configured to change the charging current and the discharging current periodically so that one or more changes in the charging current and the discharging current are made in a corresponding jittering period;
• wherein the transconductance amplifier is further configured to increase the ramp signal in magnitude in response to the capacitor being charged and decrease the ramp signal in magnitude in response to the capacitor being discharged.