| 摘要 |
PURPOSE:To minimize the harmonic distortion factor by giving a potential of a half of the sum of two reference potentials Vcc and Vss to a reference bias terminal and a midpoint bias terminal respectively so as to attain an ideal bias state. CONSTITUTION:A bias circuit 20 providing a potential of (Vcc+Vss)/2 to the reference bias terminal 14 and the midpoint bias terminal 16 respectively as bias potentials VT and VM is provided. An analog output VOUT changes around the (Vcc+Vss)/2 so as to prevent a shift of VLSB/2. Thus, the voltage biasing the LSB side termination part of a resistor ladder network LA is nearly (Vcc+ Vss)/2.
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