Amplifying Circuit and Method of Frequency Compensation
A frequency compensation and amplifying circuit technology, applied in power amplifiers and other directions, can solve problems such as limiting the application of operational amplifiers, reducing the bandwidth of operational amplifiers, and introducing noise.
Active Publication Date: 2019-03-19
SHENZHEN HANKUN IND
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Problems solved by technology
By adding a Miller compensation capacitor to ensure the stability of the operational amplifier, the bandwidth of the operational amplifier will be reduced, thereby limiting the application of the operational amplifier in the amplifier circuit that requires bandwidth.
After adding active components to ensure the stability of the operational amplifier, although the bandwidth will not be reduced, the active components will generate a certain amount of current and cause power consumption, which will inevitably introduce noise, thereby limiting the operational amplifier. Application in amplifier circuits requiring radio frequency
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[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0025] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...
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The embodiment of the invention provides an amplifier circuit and a frequency compensation method. The amplifier circuit comprises a first amplifier, a second amplifier and a passive frequency compensation device. The first amplifier comprises a first power supply port, a first signal input port and a first signal output port. The second amplifier comprises a second signal input port and a second signal output port. The first power supply port is coupled with an external power supply. The first signal input port is coupled with an external signal source. The first signal output port is coupled with the second signal input port. The second signal output port is coupled with a load. The passive frequency compensation device comprises a first port and a second port. The first port is coupled with the first signal output port. The second port is coupled with the second signal output port. Signal channels are formed by coupling the first port with the first signal output port and coupling the second port with the second signal output port, and then frequencies of the first amplifier signal and the second amplifier signal are compensated.
Description
technical field [0001] The invention relates to the field of electronic components, in particular to an amplifying circuit and a frequency compensation method. Background technique [0002] With the continuous development of science and technology and process technology, the process size of the operational amplifier is continuously reduced, so that the operational amplifier can be widely used in various amplifying circuits. The stability of the operational amplifier is an important factor to satisfy the application of the operational amplifier. In the prior art, the stability of the operational amplifier is mostly ensured by adding Miller compensation capacitors or adding active components. By adding a Miller compensation capacitor to ensure the stability of the operational amplifier, the bandwidth of the operational amplifier will be reduced, thereby limiting the application of the operational amplifier in amplifying circuits that require bandwidth. After adding active co...
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IPC IPC(8): H03F3/20
CPCH03F3/20
Inventor 张君志
Owner SHENZHEN HANKUN IND