Current mirror circuit with temperature resistance
A current mirror and circuit technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve problems such as difficulty in using current mirrors, and achieve the effects of good work, reduced voltage drop, and good performance
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[0030] Example 1,
[0031] Such as Figure 1-Figure 2 As shown, a current mirror circuit with temperature reactance includes a current mirror device 1, a voltage drop device 2 and a power input device 3;
[0032] The power input device 3 is connected to the power supply voltage to obtain a high potential;
[0033] The step-down device 2 is respectively connected to the power input device 3 and the current mirror device 1;
[0034] The power input terminal 301 of the power input device 3 is connected to the power supply voltage to obtain a high potential;
[0035] The step-down input terminal 201 of the step-down device 2 is connected to the first power output terminal 302 of the power input device 3;
[0036] The current mirror input terminal 101 of the current mirror device 1 is connected to the power supply second output terminal 303 of the power input device 3, and the current mirror input terminal 101 of the current mirror device 1 is connected to the step-down device 2 The output ...
Example Embodiment
[0049] Example 2
[0050] Such as figure 1 with image 3 According to Embodiment 1, the difference from Embodiment 1 is that the power input device includes a seventh transistor 31, an eighth transistor 32, and a feedback network 33;
[0051] The drain of the seventh type transistor and the drain of the eighth transistor 32 are connected to the power supply voltage, the source of the seventh type transistor is connected to the gate of the sixth transistor 24, the The drain of the seventh transistor 31 is connected to the drain of the second transistor 11;
[0052] The source of the eighth transistor 32 is connected to the gate of the third transistor 21; one end of the feedback network 33 is connected to the power supply voltage, and the other end is grounded.
[0053] The seventh transistor 31 has a first temperature coefficient, which is usually negative because the seventh transistor 31 is an NMOS transistor. When the temperature changes, the seventh transistor 31 can apply a gate...
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