Aiming at the problem of multiple types of requirements and large volume, this paper introduced a highly integrated and reconfigurable Global Navigation Satellite System (GNSS) Radio Frequency (RF) receiver for high-precision positioning and orientation of satellite navigation. By adopting four reconfigurable reception channels and receiving full frequency band GNSS signals in parallel, it achieved a single chip supporting high-precision positioning or orientation applications, significantly reducing the volume and cost of navigation terminals. To improve broadband signal reception, the paper proposed a new type of inductorless high linear low noise transconductance amplifier (LNTA). It can eliminate the use of source and load inductors, reduce gain and noise fluctuations when operating in navigation signals at different frequency points, and it is conducive to the reconfiguration of multimode and multi frequency reception and reduces the power consumption of LNTA. A novel IQ phase compensation method was proposed to address the issue of IQ phase imbalance. A programmable switch array with variable impedance was directly designed on the clock controlled latch path of the binary frequency division circuit. By changing the delay time of the 25% duty cycle orthogonal LO, the corresponding branch output LO phase adjustment was realized, achieving calibration of IQ imbalance and improving the image rejection rate (IRR). Testing data shows that the RF receiver achieves full band signal coverage of GNSS from 1.15 to 1.65 GHz, a minimum noise figure of 2.7 dB, and an output third-order intermodulation point power of 34.7 dBm. Adopting a low intermediate frequency and zero intermediate frequency reconfigurable architecture, it can flexibly receive multimode GNSS signals with a bandwidth of 0.8~80 MHz. By compensating for IQ imbalance and improving channel layout, 58.1 dB IRR and 57 dB channel isolation can be achieved, effectively reducing the impact of image interference and inter channel interference. Under a 1.2 V power supply, the power consumption of the receiving channel is only 24.7 mW, which can meet the high integration and diversified application requirements of high-precision positioning and orientation GNSS RF receivers.

Metal-oxide thin-film transistor (MO-TFT) can be utilized to create a flexible wearable system for detecting heart rate signals. However, the lack of high-performance complementary devices in MO-TFTs results in low gain for the implemented preamplifiers. Additionally, the relatively poor performance of MO-TFT devices poses challenges for the design of subsequent modules. In order to improve the gain of the preamplifier and reduce the performance requirements of the subsequent digital circuit, this paper proposed a common source common gate capacitor bootstrap structure preamplifier. The preamplifier was mainly composed of an external coupling bias module and a core amplifier module. The core amplifier module uses a capacitor bootstrapping technique known for its excellent stability, large output voltage swing, and low power consumption. This technique is combined with a cascode structure to enhance the overall gain of the circuit. The external coupling bias module utilizes an AC-coupled external bias structure that features low power consumption, high input impedance, and straightforward operating point setting, thereby meeting the bandpass requirements of the preamplifier for heart rate signal detection. The proposed preamplifier was designed and fabricated using a 10 µm IZO-TFT process. The test results indicate that with a 20 V power supply voltage, the circuit has a gain of 35 dB, a bandwidth of 2 Hz~2 kHz, a noise of 118.2 µV, and a power consumption of 0.1 mW. The presented preamplifier meets the requirements for detecting heart rate signals. In comparison to the current MO-TFT heart rate signal detection preamplifier, the gain has been increased by about 10 dB, which reduces the performance requirements of the subsequent digital module on the device, and is beneficial to achieve the digitalization of analog signals and maintain the signal integrity.