Voltage regulator for a flash memory
AssigneeWinbond Electronics Corp.
InventorsMasaru Yano, Hiroki Murakami
Life of this patent
Estimating the term…
Abstract
The invention provides a voltage regulator. The voltage regulator (100) of the invention includes a comparison circuit (20) and a voltage divider circuit (110). The voltage divider circuit (110) has a PMOS transistor (T6) connected to a voltage source (VDD) and resistors (R1, R2, R3, R4, R5 and R6) serially connected between the transistor (T6) and a reference voltage. A feedback voltage generated from a node (N3) between resistors R4 and R5 is provided to the comparison circuit (20). In addition, a middle voltage (Vm) generated from a node (Nc) of the resistors is provided to a well region, so the parasitic capacitance is reduced.
Claims15
A semiconductor device, comprising:
- a semiconductor substrate, having a semiconductor region;
- and
- a resistor, consisting of a conductive material formed via an insulation film on the semiconductor region,
- wherein the resistor is supplied with a first voltage and a second voltage of a reference voltage, the semiconductor region is supplied a middle voltage between the first voltage and the second voltage, and the middle voltage is generated by the resistor.
A semiconductor, having a function of using a first diffusion region and a second diffusion region as a resistor, comprising:
- a first well region, having a first conductivity type;
- a second well region, having a second conductivity type, and formed in the first well region;
- the first diffusion region and the second diffusion region, having the first conductivity type, and formed in the second well region;
- a third diffusion region, having the second conductivity type, formed in the second well region, and coupled and formed between the first diffusion region and the second diffusion region;
- a first conductive member, applying a first voltage to the first diffusion region;
- a second conductive member, applying a second voltage to the second diffusion region;
- and
- a third conductive member, electrically connected to the first diffusion region, the second diffusion region and the third diffusion region.
Dependencies are inferred from the claim text.