Low-noise negative voltage stabilizer
A voltage regulator and low-noise technology, applied in the field of negative voltage, can solve the problems that the output voltage of the charge pump cannot be applied, the peak ripple is large, and the output voltage of the charge pump has high noise content.
Inactive Publication Date: 2019-12-03
HUAWEI TECH CO LTD
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Problems solved by technology
Since the charge pump output has the characteristics of large peak ripple, high noise content and high output impedance, the applicable range is narrow, so the voltage output by the charge pump needs to be adjusted before applying it
However, due to the poor adjustment accuracy of the existing adjustment technology, the output voltage of the charge pump after adjustment by the existing adjustment circuit has high noise content and high output impedance
Therefore, the regulated charge pump output voltage cannot be used in all applications, especially those requiring high precision voltage biasing
Method used
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.
[0030] see figure 1 , the embodiment of the present invention provides a schematic structural diagram of a low-noise negative voltage regulator. Such as figure 1 As shown, the low-noise negative voltage regulator includes a fully integrated charge pump, a bias generator, an error amplifier, a pass transistor, a first voltage-dividing resistor R1 and a second voltage-dividing resistor R2.
[0031] The positive electrode of the above-mentioned fully integrated charge pump is grounded, the negative electrode of the power supply of the above-mentioned bias generator is connected to the output port of the above-mentioned fully integrated charge pump, the voltage of the output port of the fully integrated charge pump is, the voltage V UNREG is a negative voltage.
[0032] The pos...
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The invention discloses a low-noise negative voltage stabilizer. The low-noise negative voltage stabilizer comprises a fully integrated charge pump, a bias generator, an error amplifier, a transmission transistor, a voltage division resistor R1 and a voltage division resistor R2. The fully integrated charge pump provides negative voltage for the bias generator, the error amplifier and the transmission transistor, the bias generator is connected with the error amplifier and provides bias current for the error amplifier to enable the error amplifier to work normally; the error amplifier is connected with a grid electrode of the transmission transistor, and provides negative voltage for the transmission transistor. The transmission transistor is connected with the voltage division resistor R1and the voltage division resistor R2 in series and is grounded, moreover, one end of the voltage division resistor R2 is connected with an input port of the error amplifier, thus, a negative feedbackloop is formed, and dynamic regulation of output voltage of the transmission transistor is realized. For the low-noise negative voltage stabilizer provided by the invention, the fully integrated charge pump is used for providing power, integration degree of the whole stabilizer is improved, moreover, noise and output impedance of the output voltage of the low-noise negative voltage stabilizer both are low, and the low-noise negative voltage stabilizer is suitable for being generalized.
Description
technical field [0001] The invention relates to the field of negative voltage, in particular to a low-noise negative voltage regulator. Background technique [0002] In recent years, the application of negative voltage has become more and more widespread, such as biphasic tissue stimulation, reduction of electrostatic leakage, high-performance voltage-controlled oscillators, etc. Therefore, in addition to promoting the integration of GaN HEMT, InGaP and other alternative technologies with CMOS processes in the foreseeable future, highly integrated regulated negative voltage generators may open up more new avenues for various new circuits and applications. [0003] The generation of negative voltage involves three main blocks: oscillator and clock distributor, charge pump and regulation circuit. A charge pump utilizes a multiphase non-overlapping clock generated by an oscillator and a clock divider to induce a unidirectional transfer of negative charge through its internal s...
Claims
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Login to View More IPC IPC(8): G05F1/56
CPCG05F1/561G05F1/56
Inventor 德里希·康纳杨开拓王晓颖文振财张军平梁栋
Owner HUAWEI TECH CO LTD