Patent ID: 7583155
Filing Date: 2009-09-01
Classification: G06F,H03B,H03K

Abstract:
1. A device for generating a random sequence of bits comprising: an oscillating means having: an amplifying means including the at least one oscillator amplifier and a corresponding at least one differential amplifier coupled to each of the at least one oscillator amplifier, wherein the amplifying means comprise P-Type MOS transistors; a load further comprising cascoded transistors coupled to the amplifying means and a power supply, wherein the cascoded transistors comprise P-Type Metal Oxide Semiconductor (MOS) transistors, the load being adapted to protect the amplifying means from interfering signals; a tail current source coupled to the amplifying means, wherein the tail-current source comprise N-Type MOS transistors; wherein the width-over-length ratio of the transistors of the amplifying means is at least 3 times the width-over-length ratio of the transistors of the tail-current source and the width-over-length ratio of a second transistor pair of the load is at least 3 times the size of the width-over-length ratio of a first transistor pair of the load; and a grounding means.