ACTIVE BANDPASS FILTER CIRCUIT WITH ADJUSTABLE RESISTANCE DEVICE AND ADJUSTABLE CAPACITANCE DEVICE

• Main Authors: KANG JONGCHAN, AHMED MOHIUDDIN, SOVERO EMILIO A
• Format: Patent
• Language: English; Korean
• Published: 21.02.2018
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

In an exemplary example, a device includes the operational amplifiers (106, 136) of an active bandpass filter circuit (100). The device further includes an adjustable resistance device (118, 122, 128, 130, 200, 404) configured to adjust a center frequency associated with the active bandpass filter circuit (100). The device further includes an adjustable capacitance device (112, 114, 132, 138, 300) configured to adjust the center frequency and bandwidth associated with the active bandpass filter circuit (100). It is possible to increase the stability of the active bandpass filter circuit. 예시적인 예에서, 디바이스는 능동 대역 통과 필터 회로(100)의 연산 증폭기(106, 136)를 포함한다. 이 디바이스는 능동 대역 통과 필터 회로(100)와 연관된 중심 주파수를 조정하도록 구성된 가변 저항 소자(118, 122, 128, 130, 200, 404)를 더 포함한다. 이 디바이스는 능동 대역 통과 필터 회로(100)와 연관된 중심 주파수 및 대역폭을 조정하도록 구성된 가변 용량 소자(112, 114, 132, 138, 300)를 더 포함한다.