Patent ID: 6437632
Filing Date: 2002-08-20
Classification: H03K,H04J

Abstract:
A signal selection circuit receiving a plurality of input signals and at least one selection signal and providing at least one selected output signal, each said at least one selected output signal being a selected one of said plurality of input signals, said signal selection circuit comprising:a plurality of select circuit blocks disposed in a matrix state, each said select circuit block receiving a block input signal and outputting a block output signal, each said select circuit block controlled by one of said at least one selection signal so as either to transmit said block input signal forward as said block output signal or to cut off said block input signal to preclude said input signal from being transmitted forward as said block output signal; a plurality of input channels comprising input lines wired in a first direction, for making said plurality of input signals input to said select circuit blocks; and at least one output channel wired in a direction crosswise to said input lines, each said at least one output channel providing an output signal to become one of said at least one selected output signal from said signal selection circuit, wherein each said output channel comprises a predetermined plurality of said switching blocks serially interconnected by output lines such that a block output signal of a first select circuit block in said output channel becomes a block input signal of a second select circuit block in said output channel.