Analog filament impedance circuit, led lamp tube and led lighting system

An LED lamp tube, comprising:

• at least one analog filament impedance circuit wherein the at least one analog filament impedance circuit comprises a pole frequency and a zero frequency, and wherein:
• the pole frequency is less than the zero frequency;
• an equivalent impedance value of the analog filament impedance circuit remains unchanged when an input frequency is less than the pole frequency, and is a first equivalent impedance value;
• an equivalent impedance value of the analog filament impedance circuit decreases as the input frequency increases when the input frequency is greater than the pole frequency and less than the zero frequency;
• an equivalent impedance value of the analog filament impedance circuit remains unchanged when the input frequency is greater than the zero frequency, and is a second equivalent impedance value;
• and the first equivalent impedance value is greater than the second equivalent impedance value;
• and
• an LED driving module and at least one LED light emitting element, wherein:
• the LED driving module is coupled with the analog filament impedance circuit, and the at least one light emitting element is coupled with the LED driving module.

A method of utilizing an analog filament impedance circuit, comprising:

• obtaining a pole frequency that is less than a zero frequency;
• keeping an equivalent impedance value of the analog filament impedance circuit remains unchanged when an input frequency is less than the pole frequency, and is a first equivalent impedance value;
• decreasing an equivalent impedance value of the analog filament impedance circuit as the input frequency increases when the input frequency is greater than the pole frequency and less than the zero frequency;
• keeping an equivalent impedance value of the analog filament impedance circuit remains unchanged when the input frequency is greater than the zero frequency, and is a second equivalent impedance value;
• and
• obtaining the first equivalent impedance value that is greater than the second equivalent impedance value.