CURRENT SWITCH DRIVING CIRCUIT AND DIGITAL TO ANALOG CONVERTER

摘要

PURPOSE: A current switch driving circuit and a digital to analog converter are provided to prevent a working speed from being extremely reduced due to switching and blocking of a current path by using a digital to analog converter. CONSTITUTION: A current switch driving circuit(400) comprises a control unit(401), a first PMOS(P-channel Metal Oxide Semiconductor) transistor(405a), an NMOS(N-channel metal oxide semiconductor) transistor(405b), and a second PMOS(405c) transistor. A source terminal of the first PMOS transistor is connected to VDD(Voltage of drain and drain). A gate terminal of the first PMOS transistor receives an input signal. A drain terminal of the first PMOS transistor is connected to a drain terminal of the NMOS transistor to output a driving signal of a current switch. The drain terminal of the NMOS transistor is connected to the drain terminal of the first PMOS transistor. The gate terminal of the NMOS transistor receives the input signal. A source terminal of the NMOS transistor is connected to a source terminal of the second PMOS transistor. The control unit maintains a turned-on state of the second PMOS transistor.