Patent ID: 8841890

Claim:
A shunt regulator powered from an RF rectifier block, the shunt regulator comprising: an input node for receiving a power supply voltage from the RF rectifier block; a first diode having an anode coupled to the input node; a second diode having an anode coupled to the input node; a resistor divider and amplifier circuit coupled between a cathode of the first diode and ground; a transistor having a control terminal coupled to an output of the resistor divider and amplifier circuit, and a current path coupled between a cathode of the second diode and ground; and a split output comprising a first output for providing a power delivery path to power RFID circuits including a FRAM memory circuit formed on-chip with the shunt regulator, and a second output for providing a discharge-regulation path to regulate power supply voltage from the RF rectifier block, wherein the cathode of the first diode forms the first output of the split rectifier output and the cathode of the second diode forms the second output.