Patent ID: 8427132
Filing Date: 2013-04-23
Classification: G01R

Abstract:
1. A voltage detection circuit, comprising: a plurality of even-number voltage detection nodes including a first even-number voltage detection node and a second even-number voltage detection node; at least an odd-number voltage detection node including a first odd-number voltage detection node; a voltage differential generation circuit; a selection circuit controlling the connection relation of the voltage differential generation circuit, the plurality of even-number voltage detection nodes and the at least one odd-number voltage detection node, so as to output the voltages of the first even-number and first odd-number voltage detection nodes to the voltage differential generation circuit which thereby generates a first voltage differential and output the voltages of the first odd-number and second even-number voltage detection nodes to the voltage differential generation circuit which thereby generates a second voltage differential; and a computing circuit receiving the first and second voltage differentials while the voltage of the first even-number voltage detection node is a reference voltage or derived from the reference voltage and thereby known to the computing circuit, the computing circuit obtaining the voltage of the first odd-number voltage detection node according to the first voltage differential and the voltage of the first even-number voltage detection node and obtaining the voltage of the second even-number voltage detection node according to the second voltage differential and the voltage of the first odd-number voltage detection node, wherein the voltage differential generation circuit further receives an offset voltage to make sure that the first and second voltage differentials are with the same signs.