Date of publication xxxx 00, 0000, date of current version xxxx 00, 0000.

No abstract

No abstract

No abstract

This paper is focus on low cost testing method for process variation filters which is made by integrated passive device (IPD) or discrete circuit by one easy circuit, oscillator (OSC). The research is base on studying a new method to test by using a simple circuit. The 2.4GHz band-pass filter (BPF) as the device under test (DUT), using the OSC as a test circuit.For using OSC as a test circuit to the basic structure, we take band pass filter into a part of LC tank in OSC. When filters have process variation, the frequency of the OSC will change. Then determine the quality of the band-pass filter. At last, this test circuit will make a test board to measure the data practically to prove this new method for low cost testing.