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- Title
Design of the Precisely Tunable Central Frequency in BPF for Infrared Receiver.
- Authors
Lei Tian; Qinqin Li; Zhong Chen; Shujuan Chang; Weiheng Wang
- Abstract
With the principle of the traditional band pass filter (BPF) and the 0.6-µm BiCMOS process, an operational transconductance amplifier (OTA-C) type BPF which central frequency could be tuned linearly in the infrared receiver (IR) chip was proposed. The BPF uses the improved bipolar OTA circuit. The pre-stage of the negative feedback increases the input voltage range. The second stage is the differential transconductance amplifier which tunes the central frequency linearly. The whole circuit is simulated by the Cadence software. When the working temperature is 25? and the working voltage is 5V, the result shows that central frequency could quadrature tunable and the central frequency could be linear adjusted between 24 KHz and 49 KHz. The central frequency is 35.04 KHz and the gain is 21.45dB while the frequency modulation (FM) code is 10010. The test results can satisfy the actual needs in the IR chip.
- Subjects
OPERATIONAL amplifiers; DIFFERENTIAL amplifiers; BANDPASS filters; VOLTAGE
- Publication
IAENG International Journal of Computer Science, 2023, Vol 50, Issue 2, p498
- ISSN
1819-656X
- Publication type
Article