One time programmable (OTP) low power circuits and methods for providing bias voltages to wordlines

A one time programmable (OTP) low power circuit comprising:

• a single regulator configured to output a first bias voltage;
• a Bitcell comprising programmable word lines and read lines, wherein the programmable word lines and the read lines are configured to operate in a programmable mode or a read mode;
• a diode drop configured to receive the first bias voltage from the single regulator and to provide a second bias voltage to drive the read lines;
• a charge pump configured to provide a third bias voltage;
• a combinational logic controller configured to control operations of the Bitcell in the programmable mode and read mode;
• a program current sink load configured to drain a load current while the programmable word lines and the read lines are driven by the third bias voltage and the first bias voltage, respectively, in the programmable mode;
• and
• a read current sink load that is configured to drain the load current while the programmable word lines and the read lines are driven by the first bias voltage and the second bias voltage, respectively, in the read mode.

A power circuit comprising:

• a regulator configured to output a first bias voltage;
• a diode drop configured to receive the first bias voltage and output a second bias voltage;
• a charge pump configured to output a third bias voltage;
• a combined logic controller;
• and
• a one-time-programmable bit cell comprising a read line and a program line and configured to operate in a read mode or a programmable mode, wherein:
• when the bit cell is in the read mode, the combined logic controller directs the second bias voltage to the read line and the first bias voltage to the program line, and
• when the bit cell is in the programmable mode, the combined logic controller directs the first bias voltage to the read line, and the third bias voltage to the program line.