직접변환 수신기용 가변 차단주파수특성을 갖는 CMOS Gm-C 저역통과필터 설계 (The Design of A CMOS Gm-C Lowpass Filter with Variable Cutoff Frequency for Direct Conversion Receiver)

서지정보

· 발행기관 : 대한전기학회
· 수록지 정보 : 전기학회논문지ABCD / 57권 / 8호 / 1464 ~ 1469페이지
· 저자명 : 방준호

초록

A CMOS Gm-C filter with variable cutoff frequency applicable for using in the direct conversion receiver is designed. The designed filter comprises the CMOS differential transconductors, and the gm of the transconductor is controlled by the bias voltage. This configuration can compensate variant of the cutoff frequency which could be generated by external noises, and also be used in multiband receiver. As a results of HSPICE simulation, the control range of the cutoff frequency is 1.5㎒～3.5㎒ and the gain control range is -2.8dB～2.6dB. The layout of the designed 5th-order Elliptic low-pass filter is performed to fabricate a chip using 2.5V-0.25㎛ CMOS processing parameter.

영어초록

A CMOS Gm-C filter with variable cutoff frequency applicable for using in the direct conversion receiver is designed. The designed filter comprises the CMOS differential transconductors, and the gm of the transconductor is controlled by the bias voltage. This configuration can compensate variant of the cutoff frequency which could be generated by external noises, and also be used in multiband receiver. As a results of HSPICE simulation, the control range of the cutoff frequency is 1.5㎒～3.5㎒ and the gain control range is -2.8dB～2.6dB. The layout of the designed 5th-order Elliptic low-pass filter is performed to fabricate a chip using 2.5V-0.25㎛ CMOS processing parameter.

참고자료

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