Amplifier circuit applied to low power consumption system
An amplifier circuit and low power consumption technology, which is applied in the field of amplifier circuits of low power consumption systems, can solve problems such as increasing system power consumption, and achieve the effect of increasing power consumption
Inactive Publication Date: 2014-07-30
CHINA KEY SYST & INTEGRATED CIRCUIT
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Abstract
The invention discloses an amplifier circuit applied to a low power consumption system. The amplifier circuit comprises CMOSs (Complementary Metal-Oxide-Semiconductor Transistors) M1, M2, M3 and M4, resistors R1, R2, R3 and R4, capacitors C1 and C2 and a current source IDC, wherein the source end of the M1 is respectively connected to the source end of the M2 and the upper end of the IDC, the R1 is connected between the drain end of the M1 and the source end of the M3, and the C1 is connected between the drain end of the M1 and the grid end of the M3; the R3 is connected between the grid end of the M3 and a power supply VDD, and the drain end of the R3 is connected with the power supply VDD; the R2 is connected between the drain end of the M2 and the source end of the M4, and the C2 is connected between the drain end of the M2 and the grid end of the M4; the R4 is connected between the grid end of the M4 and the power supply VDD, and the drain end of the M4 is connected with the power supply VDD. The amplifier circuit has the beneficial effects that amplification of an input signal is realized in a first-level amplifier, a function of driving a backward-stage circuit is provided, and the amplifier circuit is very suitable for being applied to the low power consumption system.
Application Domain
Amplifier modifications to raise efficiency
Technology Topic
Oxide semiconductorCurrent source +5
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