Low-voltage bias generator based on high-voltage supply

A method comprising:

• receiving a high voltage (HV) from an HV line and providing a voltage on an HV regulated line lower than a voltage of the HV line using a main diode;
• providing a first current using a first current mirror, the first current mirror having a gate and first and second terminals, the gate coupled to the first terminal of the main diode and the second terminal coupled to the HV regulated line;
• providing a second current using a second current mirror, the second current mirror having first, second, and third terminals, the first terminal coupled to the HV line, the second terminal coupled to the first terminal of the first current mirror, and the third terminal coupled to a low-voltage (LV) line;
• providing a voltage differential between the HV regulated line and the LV line below an LV threshold using the impedance, currents of the first and second current mirrors, and the main diode;
• and
• providing a voltage differential between the HV regulated line and the HV line above the LV threshold.

A system for storing data, the system comprising:

• a main diode having first and second terminals, the first terminal coupled to a high-voltage (HV) line and the second terminal coupled to an HV regulated line, wherein the main diode is configured to provide a voltage on the HV regulated line lower than a voltage of the HV line;
• a first current mirror configured to provide a first current, the first current mirror having a gate and first and second terminals, the gate coupled to the first terminal of the main diode and the second terminal coupled to the HV regulated line;
• a second current mirror configured to provide a second current, the second current mirror having first, second, and third terminals, the first terminal coupled to the HV line, the second terminal coupled to the first terminal of the first current mirror, and the third terminal coupled to a low-voltage (LV) line;
• an impedance coupled between the LV line and the HV regulated line, wherein the impedance, currents of the first and second current mirrors, and the main diode are configured to provide a voltage differential between the HV regulated line and the LV line below a low-voltage threshold, to provide a voltage differential between the HV regulated line and the HV line above the low-voltage threshold, and wherein a voltage on the LV line depends on the impedance;
• a source gate connected to a bit line, a source line and the LV line, the bit line connected to a NAND stack;
• the NAND stack to store data;
• and
• the source line connected to the HV regulated line and the NAND stack.