Sectional multi-order compensation high-precision voltage and current reference circuit
A multi-stage compensation and current reference technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve the problem of large deviation of the output bandgap reference voltage
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[0048] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0049] The present invention provides a high-precision voltage and current reference circuit with segmented multi-stage compensation, which is an on-chip circuit used to generate high-precision voltage and current references, such as image 3 Shown is a circuit block diagram of the present invention, including a basic bandgap circuit 101 , a low-temperature first-order negative temperature coefficient compensation circuit 102 , a high-temperature high-order positive temperature coefficient compensation circuit 103 , a voltage-stabilizing trimming circuit 104 and a trimming logic circuit 105 .
[0050] The basic bandgap circuit 101 adopts the method of first-order positive and negative temperature coefficient superposition to generate a primary bandgap voltage with poor temperature coefficient; receives the compensation current with negative tempe...
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