| 摘要 |
PURPOSE:To lower the output impedance of a MISFET amplifier circuit by providing negative feedback by forming a fixed circuit. CONSTITUTION:The gate of p-type MISFETQP1 is connected to signal input terminal 3 and while its drain is connected to power terminal 1, its source is also connected to the input side of phase inversion amplifier 12. The output of this amplifier 12 is connected to signal output terminal 4 and also to the source of n-type MISFET QN3, whose drain is further connected to the input side of amplifier 12. Then, the gate of FETQN3 is connected to power terminal 2 to form a negative feedback loop to FETQP1 and amplifier 12 by way of FETQN3. The above-mentioned constitution provides reduction in output impedance. Additionally, the same effect can be obtained by reversing the channel types of FETQP1 and FETQN3 or by connecting sources and drains reversely. |
