Analog-to-digital converter

Abstract

Abstract PURPOSE:To eliminate conversion errors and to make the pellet size small, by forming a resistor string to obtain a high-level voltage on a semiconductor pellet while folding. CONSTITUTION:In an A/D converter of 8 bits, a resistor string consisting of 256 sets of resistors is required. The resistor string is folded at 16 sets of resistors. Reference voltage pickup points of V16, V32,...V226 are provided in correspondence to 16 sets of folding points. Voltage comparison circuits M1,...M15 are provided at each folding point. These circuits determine the high-order 4 bits. Voltage comparison circuits N1,...N15 for low-order bits are provided along the stright line part of the resistor layer. First, the high-order 4 bits are determined, the data in the high-order 4 bits is inputted to an encoder, the encoded reference voltage and an input voltage are compared to determine the low-order 4 bits.

Inventors

• 👤 Takeo Sekino
• 👤 関野　武男
• 👤 Hitoshi Takeda
• 👤 竹田　仁

Bibliographic Details