Amplifier system for bias current source based on step-down constant current
A bias current source and constant current technology, applied in the electronic field, can solve the problems of current, voltage instability, signal distortion, etc., and achieve the effect of automatic constant voltage and current, high sensitivity, and low price
Inactive Publication Date: 2015-10-07
CHENGDU JIESHENG TECH CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the defects that the signal amplified by the current amplifier is distorted and its current and voltage are unstable, and to provide a bias current source amplifier system based on a step-down constant current that can make the signal undistorted and the current and voltage stable.
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[0016] Such as figure 1 As shown, the present invention consists of an amplifying circuit, field effect transistor Q1, the negative pole is connected to the gate of field effect transistor Q1, and the positive pole is used as a polarity capacitance C1 of the signal input end, one end is connected with the gate of field effect transistor Q1, and the other end A grounded resistor R4, a current source circuit connected to the source of the field effect transistor Q1, a linear drive circuit arranged between the current source circuit and the amplifying circuit, and a linear drive circuit arranged between the drain of the field effect transistor Q1 and the linear drive circuit It is composed of a step-down constant current circuit.
[0017] The step-down constant current circuit consists of a step-down chip U2, a transistor VT4, a transistor VT5, an amplifier P2, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resist...
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The invention discloses a linear drive based bias current source amplifier system. The linear drive based bias current source amplifier system mainly consists of a field-effect tube Q1, a polar capacitor C1, a resistor R4, a current source circuit and an amplification circuit, wherein the negative pole of the polar capacitor C1 is connected with the grid electrode of the field-effect tube Q1, the positive pole of the polar capacitor C1 serves as a signal input end, one end of the resistor R4 is connected with the grid electrode of the field-effect tube Q1, the other end of the resistor R4 is grounded, and the current source circuit is connected with the source electrode of the field-effect tube Q1. The linear drive based bias current source amplifier system is characterized in that a linear drive circuit is further connected between the drain electrode of the field-effect tube Q1 and the amplification circuit and consists of a drive chip U, an audion VT3, an audion VT4, an audion VT5, an audion VT6 and the like. The linear drive circuit of the linear drive based bias current source amplifier system can stably drive the amplifier system, and accordingly the amplification effect of an amplifier is improved.
Description
technical field [0001] The invention relates to the field of electronics, in particular to a bias current source amplifier system based on a step-down constant current. Background technique [0002] An amplifier is a circuit unit with a very high magnification. In actual circuits, some kind of functional module is usually combined with a feedback network. An amplifier is a circuit unit named from a functional point of view, which can be realized by a discrete device or in a semiconductor chip. With the development of semiconductor technology, most amplifiers exist in the form of a single chip. With the continuous development of electronic technology, amplifiers have been widely used in the electronic industry. However, the currently used amplifiers often cause signal distortion after amplifying the signal, and the current and voltage are unstable, which brings great trouble to the subsequent signal processing. Contents of the invention [0003] The purpose of the prese...
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IPC IPC(8): H03F1/32
Inventor 雷明方
Owner CHENGDU JIESHENG TECH CO LTD