Passive low-pass filter

Abstract

The invention discloses a passive low-pass filter which comprises a first resistor, a second resistor, a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor. According to the passive low-pass filter disclosed by the invention, the multiple inductors and capacitors are matched to be used so as to form an elliptical filter, so that passing bands and stop bands of the filter fluctuate, attenuation characteristics are respectively steep, amplitude-frequency characteristics and cut-off characteristics meet requirements, and energy consumption and attenuation in the filter are reduced.

Description

technical field

[0001] The invention relates to a filter circuit, in particular to a passive low-pass filter. Background technique

[0002] The power filter is a filter circuit composed of capacitors, inductors and resistors. The filter can effectively filter the frequency point of a specific frequency in the power line or frequencies other than this frequency point to obtain a power signal of a specific frequency or eliminate a power signal of a specific frequency. Among them, the passive filter is a filter composed of only passive components, which is composed of the principle that the reactance of capacitors and inductance components changes with frequency. The advantages of this type of filter are: the circuit is relatively simple, does not require DC power supply, and has high reliability; the disadvantage is: the signal in the passband has energy loss, the load effect is relatively obvious, and it is easy to cause electromagnetic induction when using inductive compone...

Examples

Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing:

[0017] This technology is mainly to protect the circuit structure, and the specific models of each electronic component and the parameters of resistance, capacitance, etc. are specified in detail. Those skilled in the art can pass the figure 1 The circuit diagram shown connects each electronic component, so as to achieve the purpose of this technology, that is, to solve the energy loss of the signal in the passband, and the load effect is relatively obvious. When using an inductive component, it is easy to cause electromagnetic induction. When the inductance L is large When the volume and weight of the filter are relatively large; and this is a circuit structure, as long as the various electronic components are connected through wires to form a complete circuit, its function can be realized, so no additional specific product structure is required.

[0018] Such as figure 1...

technical field

[0001] The invention relates to a filter circuit, in particular to a passive low-pass filter. Background technique

[0002] The power filter is a filter circuit composed of capacitors, inductors and resistors. The filter can effectively filter the frequency point of a specific frequency in the power line or frequencies other than this frequency point to obtain a power signal of a specific frequency or eliminate a power signal of a specific frequency. Among them, the passive filter is a filter composed of only passive components, which is composed of the principle that the reactance of capacitors and inductance components changes with frequency. The advantages of this type of filter are: the circuit is relatively simple, does not require DC power supply, and has high reliability; the disadvantage is: the signal in the passband has energy loss, the load effect is relatively obvious, and it is easy to cause electromagnetic induction when using inductive compone...

Examples

Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing:

[0017] This technology is mainly to protect the circuit structure, and the specific models of each electronic component and the parameters of resistance, capacitance, etc. are specified in detail. Those skilled in the art can pass the figure 1 The circuit diagram shown connects each electronic component, so as to achieve the purpose of this technology, that is, to solve the energy loss of the signal in the passband, and the load effect is relatively obvious. When using an inductive component, it is easy to cause electromagnetic induction. When the inductance L is large When the volume and weight of the filter are relatively large; and this is a circuit structure, as long as the various electronic components are connected through wires to form a complete circuit, its function can be realized, so no additional specific product structure is required.

[0018] Such as figure 1...

Images