A Complementary Bipolar Current Reference Source with Power Consumption Step Adjustment Capability

Abstract

The invention discloses a complementary bipolar current reference with power consumption step-by-step regulation capability. The complementary bipolar current reference comprises a voltage reference generation circuit structure and a current reference control and generation circuit structure connected with the voltage reference generation circuit structure. The complementary bipolar current reference has the benefits as follows: full bias current, 50% full bias current and 25% full bias current can be obtained by setting different bias voltages, and the flexibility of the current reference isincreased to adapt to more and more complicated circuits. Under the condition that the accuracy of the current reference is guaranteed, the flexibility of the structure is increased, and the current reference can provide 25% full bias current, 50% full bias current and 100% full bias current. Moreover, the complementary bipolar current reference still has the same good characteristic of avoidanceof temperature influence as conventional current references, is not complicated in structure and easy to implement and can meet requirements of some complicated circuits for different current references.

Description

technical field [0001] The invention relates to the field of analog integrated circuit design, in particular to a complementary bipolar reference current source with power consumption step adjustment capability. Background technique [0002] The reference current source is a very important module circuit in an integrated circuit. It provides a current that is not affected by temperature changes for the entire circuit, that is, it provides a stable static operating point. The reference current source is widely used in ADC / DAC, amplifier, lock Phase loop, LDO and other circuits. [0003] In the traditional reference current source, some commonly used structures are Widlar current source and Oguey current source, etc., and these current sources can provide a stable static operating point. The traditional structure is a multi-tube bias current source. A resistor is added to one side of the symmetrical multi-tube structure, and a reference current that is not affected by the cir...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the traditional reference current source can only provide current of the same size and cannot adjust the current of different sizes by changing the bias, which makes it difficult to meet the current requirements of some circuits for bias currents of different sizes, the present invention proposes a step-by-step regulation of power consumption Complementary bipolar reference current source with high capacity. The present invention achieves the effect of controlling the size of the reference current by setting two different bias voltages and adjusting the opening and closing of the two bias voltages. By setting different bias voltages, full Bias current, 50% full bias current and 25% full bias current, increasing the flexibility of the reference current source to adapt to more and more complex circuits

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