Analog-to-digital modulation

A method of modulating a supplied analog signal to generate an output signal that is substantially related to the supplied analog signal in accordance with a transfer function, the method comprising:

• comparing the supplied analog signal with a noise signal;
• and
• as a result of each comparison, causing the output signal to have a first value if the supplied analog signal is greater than the noise signal and causing the output signal to have a second value if the supplied analog signal is lower than the noise signal,
• wherein the noise signal has a colored spectrum, and
• wherein the transfer function is substantially determined by an amplitude distribution of the noise signal.

A method of modulating a supplied analog signal to generate an output signal that is substantially related to the supplied analog signal in accordance with a transfer function, the method comprising:

• comparing the supplied analog signal with a noise signal;
• as a result of each comparison, causing the output signal to have a first value if the supplied analog signal is greater than the noise signal and causing the output signal to have a second value if the supplied analog signal is lower than the noise signal;
• and
• generating the noise signal by filtering an initial noise signal by a high-pass filter,
• wherein the transfer function is substantially determined by an amplitude distribution of the noise signal.

A method of modulating a supplied analog signal to generate an output signal that is substantially related to the supplied analog signal in accordance with a transfer function, the method comprising:

• comparing the supplied analog signal with a noise signal;
• as a result of each comparison, causing the output signal to have a first value if the supplied analog signal is greater than the noise signal and causing the output signal to have a second value if the supplied analog signal is lower than the noise signal;
• and
• generating the noise signal by filtering an initial noise signal by a notch filter,
• wherein the transfer function is substantially determined by an amplitude distribution of the noise signal.

A modulator for modulating a supplied analog signal to generate an output signal that is substantially related to the supplied analog signal in accordance with a transfer function, the modulator comprising:

• logic that receives the supplied analog signal;
• a comparator that compares the supplied analog signal with a noise signal and that, as a result of each comparison, generates the output signal at a first value if the supplied analog signal is greater than the noise signal and generates an the output signal at a second value if the supplied analog signal is lower than the noise signal;
• and
• a noise generator for generating the noise signal, wherein the noise signal has a colored spectrum,
• wherein the transfer function is substantially determined by an amplitude distribution of the noise signal.

A modulator for modulating a supplied analog signal to generate an output signal that is substantially related to the supplied analog signal in accordance with a transfer function, the modulator comprising:

• logic that receives the supplied analog signal;
• a comparator that compares the supplied analog signal with a noise signal and that, as a result of each comparison, generates the output signal at a first value if the supplied analog signal is greater than the noise signal and generates the output signal at a second value if the supplied analog signal is lower than the noise signal;
• and
• a high-pass filter that generates the noise signal by filtering an initial noise signal,
• wherein the transfer function is substantially determined by an amplitude distribution of the noise signal.

A modulator for modulating a supplied analog signal to generate an output signal that is substantially related to the supplied analog signal in accordance with a transfer function, the modulator comprising:

• logic that receives the supplied analog signal;
• a comparator that compares the supplied analog signal with a noise signal and that, as a result of each comparison, generates the output signal at a first value if the supplied analog signal is greater than the noise signal and generates the output signal at a second value if the supplied analog signal is lower than the noise signal;
• and
• a notch filter that generates the noise signal by filtering an initial noise signal,
• wherein the transfer function is substantially determined by an amplitude distribution of the noise signal.

An apparatus comprising:

• a modulator for modulating a supplied analog signal comprising:
• logic that receives the supplied analog signal;
• and
• a comparator that compares the supplied analog signal with a noise signal and that, as a result of each comparison, generates an output signal having a first value if the supplied analog signal is greater than the noise signal and generates an output signal having a second value if the supplied analog signal is lower than the noise signal,
• wherein a transfer function of the modulator is non-linear;
• and
• logic that linearizes a set of output signals generated by the modulator,
• wherein the logic that linearizes the set of output signals generated by the modulator comprises a look-up table having stored therein values used to replace output signal values.