A single-chip VHF and UHF receiver for radio paging

High-Frequency Oscillator Design for Integrated Transceivers

“…Zero-IF receivers require quadrature (l/Q) LO signals covering the total input frequency range [90]. In addition, the LO and the tuning system should be constructed in such a way that LO self-reception [150] is minimized, which is caused by LO leakage [90] to the antenna. A fundamental solution to the abovementioned problems is the double-loop architecture shown in Figure 9.13 [3,38].…”

Heterogeneous Wafer-Scale Circuit Architectures

“…Some of the important aspects of this architecture are RF-compatible packaging; low-frequency IF; all-Si-based circuit realization for up to Ka-band frequency; relaxed specifications on linearity, dynamic range, image frequency rejection; phase noise and digital IF down-conversion; filtering; demodulation; and signal processing [1]- [3].…”

“…Three-dimensional (3-D) integration and on wafer packaging of heterogeneous wafers are the future in high-frequency circuit design and circuit architecture. It leads to the development of RF front-end transceiver architectures [1]- [3] that consume less power, are compact, are characterized by low cost and high performance and are appropriate for advanced systems (Figure 1). …”

A Transimpedance Amplifier Employing a New DC Offset Cancellation Method for WCDMA/LTE Applications

“…Many DC offset cancellation (DCOC) methods have been published in the literatures [1][2][3][4][5]. AC coupling [1], a DC feedback loop (DCFL) [2][3][4], and a digital storage system using digital-to-analog converters (DAC) [5] are the most popular DCOC methods.…”

“…AC coupling [1], a DC feedback loop (DCFL) [2][3][4], and a digital storage system using digital-to-analog converters (DAC) [5] are the most popular DCOC methods. The AC coupling method requires extremely large capacitors and/or resistors for the large time constant.…”