Amplifier circuit and signal amplifying method

• Main Authors: LIN JIAQING, LIN JUNBAO
• Format: Patent
• Language: English
• Published: 18.03.2015
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

The invention provides an amplifier circuit and a signal amplifying method. The amplifier circuit has a static working mode and a dynamic working state and comprises an amplifier, a mapping circuit, a constant-current circuit, an impedance circuit and an output buffer; the amplifier is used for generating an amplifying signal according to a positive input signal and a negative input signal; the mapping circuit is used for mapping the amplifying signal through a first polarized current and generating a mapping current in a first node; the constant-current circuit is connected in series between the first node and a second node and used for providing a constant current; the impedance circuit is connected in series between the first node and the second node; the output buffer is used for generating an output signal at an output end point according to the voltage difference between the first node and the second node and the amplifying signal. With the adoption of the amplifier circuit and the signal amplifying method, the amplifying range of the amplifier circuit is expanded.