| 摘要 |
PURPOSE:To omit the switch operation circuit and thus to simplify the circuit constitution as well as to ensure the steady operation by amplifying independently the two signals supplied via the amplifier elements at both the positive and negative phase sides. CONSTITUTION:The differential amplifier contains transistor 2 as the positive phase side smplifier element and Tr3 as the negative phase side amplifier element. In such amplifier, signal f1 supplied from input terminal 6 of the other side is supplied to the base or gate of Tr2. Then inpedance element 15 and 16 are connected to the base of Tr2 and 3 each, and the value of impedance element 14 is set low to input signal f1 and high to signal f2 respectively. Thus, each amplification can be performed independently to each other, and thus the output signal is delivered from collector resistance R8 of Tr3. |
