Patent ID: 6097213
Filing Date: 2000-08-01
Classification: G11C

Abstract:
A switching circuit, comprising: a reference voltage, an input voltage, suitable to assume alternatively a negative value or a value equal to said reference voltage, an output node, characterized in that said output node is suitable to assume selectively three possible voltage values equal to a supply voltage, to said reference voltage, to said input voltage or, alternatively, to be kept floating, at high impedance, in response to a first, a second, a third, a fourth, a fifth, a sixth control logic signal, switching between said supply voltage and said reference voltage, comprising a first transistor, with a first electrode controlled by said first control logic signal, a second electrode corresponding to a first node and with the control electrode connected to said reference voltage, a second transistor, with a first electrode controlled by said second control logic signal, a second electrode corresponding to a second node and with the control electrode connected to said reference voltage, a third transistor, with a first electrode controlled by said fifth control logic signal, a second electrode connected to said first node and the control electrode connected to said second node, a fourth transistor, with a first electrode controlled by said fifth control logic signal, a second electrode connected to said second node and the control electrode connected to said first node, a fifth transistor, with a first electrode connected to said input voltage, a second electrode connected to said first node and the control electrode connected to said second node, a sixth transistor, with a first electrode connected to said input voltage, a second electrode connected to said second node and the control electrode connected to said first node, a seventh transistor, with a first electrode connected to said output node, a second electrode connected to said second node and the control electrode connected to said fourth control logic signal, an eighth transistor, with a first electrode connected to said output node, a second electrode connected to said third control logic signal and the control electrode connected to said sixth control logic signal.