Patent ID: 8477544
Filing Date: 2013-07-02
Classification: H03K

Abstract:
1. A circuit apparatus comprising: an output circuit that outputs a signal to a host apparatus via a bus; an output control circuit that controls the output circuit, and a data transfer circuit that transfers data between multiple storage apparatuses connected to a memory connection bus and the host apparatus, wherein the storage apparatus is a storage apparatus provided in a liquid receptacle; wherein the output circuit includes: a first conductive transistor provided between an output node and a first power source node; and a second conductive transistor provided between the output node and a second power source node, the output control circuit: sets one of the first conductive transistor and the second conductive transistor to off and controls the other transistor on or off in a first output mode; and sets the first conductive transistor to on and the second conductive transistor to off, or sets the first conductive transistor to off and the second conductive transistor to on, in a second output mode, and when the output circuit outputs an output signal to the output node: the output control circuit switches from the first output mode, in which the output node is set to a high-impedance state, to the second output mode; the output circuit outputs a voltage level corresponding to the output signal to the output node after the second output mode has been set; and the output control circuit switches the output circuit from the second output mode to the first output mode after the voltage level has been outputted to the output node.