초록 ▼

An integrated circuit amplifier having a random input offset voltage is adaptable such that the input offset voltage may be cancelled out. An input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the

An integrated circuit amplifier having a random input offset voltage is adaptable such that the input offset voltage may be cancelled out. An input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the amplifier and the floating node. An ultraviolet window above the second capacitor allows the floating node to be charged, by the application of ultraviolet light, to a voltage which effectively cancels the input offset voltage.

대표청구항 ▼

An analog MOS inverting amplifier fabricated as a part of an integrated circuit, said amplifier having a gain of magnitude much larger than 1, including: an output node, an inverting input node, said input node being a floating node forming the gate of at least one MOS transistor, a first capacitor

An analog MOS inverting amplifier fabricated as a part of an integrated circuit, said amplifier having a gain of magnitude much larger than 1, including: an output node, an inverting input node, said input node being a floating node forming the gate of at least one MOS transistor, a first capacitor for coupling an input to said circuit to said floating node, a second capacitor connected from said output node to said floating node, an opaque layer covering portions of the surface of said integrated circuit containing active circuits, said opaque layer having an aperture therein above said second capacitor for allowing ultraviolet light to fall onto both electrodes of said second capacitor whereby the offset voltage of said amplifier can be adapted while a source of ultraviolet light is present.