Low-power-consumption high-transient-response low-dropout linear regulator without off-chip capacitor

Abstract

The invention discloses a low-power-consumption, high-transient-response and off-chip-capacitor-free low-dropout linear regulator. A grid direct-current bias network is used for providing grid bias voltage needed by working of a power amplification transistor. The drain direct-current bias network is used for providing drain bias voltage required by the work of the power amplification transistor; the input end impedance matching network comprises a microstrip line, a blocking capacitor and an RC parallel circuit; the output end impedance matching network comprises a harmonic control network and an elliptical low-pass filtering matching network, and the harmonic control network selects two frequency points outside a passband to perform secondary harmonic control; the elliptic low-pass filtering matching network is obtained by improving a six-order Chebyshev low-pass filter, two transmission zero points are generated outside a working frequency band, and conversion from fundamental wave impedance to second harmonic impedance is achieved. According to the invention, the power amplifier can realize high efficiency and high gain in a super-quintuple frequency working bandwidth.

Description

technical field [0001] The invention belongs to the technical field of linear regulators, in particular to a low-power-consumption, high-transient-response, and low-dropout linear regulator without off-chip capacitance. Background technique [0002] With the continuous progress of integrated circuit design and process, more and more circuits are integrated together. Usually a large-scale digital-analog hybrid chip contains multiple different digital and analog circuit modules. The analog circuit module needs to serve the digital module. For example, the analog power management module needs to provide a stable voltage for the digital module. The most commonly used power management module It is LDO (low dropout regulator, low dropout linear regulator). [0003] Nowadays, the frequency of digital modules is getting higher and higher, which also brings challenges to the design of analog modules. For example, in the application of ADC (analog to digital converter, analog-to-digi...

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Problems solved by technology

[0008] Therefore, in view of the existing needs and the defects in the current technology, it is necessary to conduct research and improvement to provide a solution to solve this demand and improve the defects in the existing technology

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