Patent ID: 7560974

Claim:
A level detector within a back-bias voltage generator, the level detector comprising: a toggling unit that causes an enable signal to be activated when an absolute value of a back-bias voltage is less than an absolute value of a monitoring level; and a temperature detector that controls the toggling unit for increasing the absolute value of the monitoring level with an increase in temperature, wherein the toggling unit includes a controlled inverter and pull-up and pull-down devices for biasing the controlled inverter; and wherein the temperature detector includes: a diode-connected transistor; a resistor; and a turned-on transistor coupled in series with the resistor at a control node generating a control bias voltage that increases with the temperature, and wherein the control bias voltage generated at said same one control node is directly applied on gates of the pull up and pull down devices that are field effect transistors; wherein the diode-connected transistor is coupled in series with the resistor.