Patent ID: 8301674

Claim:
A random signal generator, comprising: a differential noise generation circuit, comprising; a pair of input nodes that receive noise signals, a pair of output nodes that generates differential noise signals, wherein the differential noise generation circuit is self-biased such that the pair of input nodes is coupled to the pair of output nodes, a metal oxide semiconductor (MOS) differential pair coupled between a first voltage and a second voltage, wherein gate electrodes of the MOS differential pair are coupled to the pair of input nodes and drain electrodes of the MOS differential pair are coupled to the pair of output nodes, a self-bias resistor pair coupled between the pair of input nodes and the pair of output nodes, a noise resistor pair coupled to the pair of input nodes, a capacitor pair coupled between the noise resistor pair and the second voltage, and an input resistor pair coupled between the pair of input nodes and the gate electrodes of the MOS differential pair; an amplification circuit configured to amplify the differential noise signals output from the differential noise generation circuit to generate amplified differential signals; and a single-ended amplifier configured to generate a random signal based on the amplified differential signals, the random signal having irregular transition time points.