Chopper-stabilized operational amplifier including integrated circuit with true random voltage output

A method performed on a single integrated circuit chip of timing the switchings of a chopper switch in a chopper-stabilized operational amplifier implemented on the single integrated circuit chip comprising:

• creating white noise voltages on said integrated circuit chip;
• amplifying and bandpass filtering said white noise voltages on said chip to produce a first voltage signal on said chip, said first voltage signal having a randomly varying voltage value within a selected range of voltage values;
• controlling the switching of the chopper switch on said chip with the first voltage signal or a signal derived from the first voltage signal;
• and
• switching the chopper switch between a first state and a second state with a randomly varying amount of time between each switching, wherein the amount of time varies randomly within a selected range.

A randomized clocking circuit implemented on a single integrated circuit chip for generating a randomized clocking signal that is provided to a second circuit on the same chip comprising:

• a component on said chip that generates white noise voltages upon application of a DC current;
• an amplifier on said chip that amplifies said white noise voltages;
• a bandpass filter on said chip that filters said amplified white noise voltages;
• an oscillator on said chip that receives the amplified and bandpass filtered white noise voltages, or a signal derived therefrom, and outputs said randomized clocking signal,
• wherein said randomized clocking signal oscillates between a first voltage state and a second voltage with a random amount of time between oscillations, said amount of time varying randomly within a selected range;
• and
• a second circuit on said chip that receives and utilizes said randomized clocking signal.

A method of producing and utilizing on a single integrated circuit chip a randomized clocking signal that oscillates between a first voltage state and a second voltage state with a randomly varying amount of time between each oscillation comprising:

• creating white noise voltages on said integrated circuit chip;
• amplifying and bandpass filtering said white noise voltages to produce a first voltage signal, said first voltage signal having a randomly varying voltage value within a selected range of voltage values;
• providing an oscillator on said integrated circuit chip, said oscillator capable of oscillating between a first state and second state;
• inputting the first voltage signal or a signal derived therefrom into said oscillator;
• and
• controlling the oscillations of the oscillator with said first voltage signal or the signal derived therefrom, so that the oscillator oscillates between the first state and the second state with a randomly varying amount of time between each oscillation, wherein said amount of time varies randomly within a selected range;
• outputting said randomized clocking signal from said oscillator based on whether the oscillator is in the first state or the second state;
• and
• providing said randomized clocking signal to a second circuit on the same chip, and utilizing said randomized clocking signal within said second circuit.

A circuit implemented on a single integrated circuit chip for generating a randomized voltage signal having a random voltage value within a selected range comprising:

• a component on said chip that generates white noise voltages upon application of a DC current;
• a first amplifier on said chip that amplifies said white noise voltages;
• a bandpass filter on said chip that filters said amplified white noise voltages;
• an integrator circuit on said chip in a feedback connection with said amplifier;
• and
• wherein said circuit outputs an amplified, bandpass filtered voltage signal having a random voltage value that varies randomly within a selected range.