Patent ID: 8760190
Filing Date: 2014-06-24
Classification: H03K

Abstract:
1. A method to provide Process-Voltage-Temperature (PVT) compensation for an Input/Output (IO) interface, said IO interface having a bandgap reference voltage (V BGR ) and a reference frequency (F REF ), said method comprising: connecting said V reducing said V connecting said V connecting said current mirror system to a high supply voltage (V connecting a driver bit cell to a low supply voltage (V connecting said current mirror system to said driver bit cell such that a process-variable-temperature current (I connecting said current mirror system to a compensated current controlled oscillator; mirroring said I generating an oscillation frequency (F connecting said F connecting said F measuring, by said digital system, a desired count period based on F accumulating, by said digital system, a count of said F looking up, by said digital system, a PVT control bit value that correlates to said accumulated count of said F providing, by said digital system, said looked up PVT control bit value to said IO interface.