Operational transconductance amplifier with enhanced current sinking capacity
A current absorption and amplifier circuit technology, applied in the direction of DC coupled DC amplifiers, amplifiers with semiconductor devices/discharge tubes, amplifiers, etc., can solve the problems of insufficient absorption capacity of the current source 134, threat circuit, voltage rise, etc.
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[0018] Now refer to figure 2 , which shows a circuit diagram of an operational transconductance amplifier 200 with enhanced current sinking capability.
[0019] figure 2 Like reference numerals refer to figure 1 Similar parts shown. I won't repeat it here figure 2 in such components, instead refer to the previously referenced figure 1 The description provided.
[0020] The difference between the amplifier 200 and the amplifier 100 is that the second current source 134 has been replaced by the current sink circuit 202 . The current sink circuit 202 includes a reference current source IC1 coupled to source current into a current mirror circuit 206 formed by transistors M4 and M5. Transistors M4 and M5 are n-channel type MOSFET transistors. The source terminals of transistors M4 and M5 are coupled to reference node 110 . The drain terminal of transistor M5 is coupled to receive the current sourced by reference current source IC1. The gate terminals of transistors M4 a...
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