Patent ID: 7352230
Filing Date: 2008-04-01
Classification: G11C

Abstract:
1. An internal power voltage trimming circuit for use in an internal power voltage generating circuit, comprising: a trimming control signal generating means for decoding an inputted address signal to generate a trimming selection signal and trimming enable signals, including a trimming selection signal generator for generating the trimming selection signal for trimming the internal power voltage levels based on the inputted address signal and a trimming enable signal generator for generating the trimming enable signals for controlling transfer of the trimming selection signal by using the inputted address signal; a selection mixer for receiving the trimming enable signals and a test mode entry command from the trimming control signal generating means to selectively enable one of the trimming enable signals under control of the test mode entry command; and an internal power voltage level controlling means for receiving the trimming selection signal and the enabled trimming enable signal, the internal power voltage level controlling means including unit controllers, each unit controller controlling the levels of the internal power voltages based on the trimming selection signal and the enabled trimming enable signal, wherein the trimming selection signal generator includes a decoder for decoding the inputted address signal and an encoder for encoding an output signal from the decoder to generate the trimming selection signal and wherein one of unit controllers corresponding to the enabled trimming enable signal is enabled.