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Silicon Labs Tunes Into Audiophile Market With High-Performance Radio Receivers

Silicon Laboratories Inc. (NASDAQ: SLAB), a leader in high-performance, analog-intensive, mixed-signal ICs, today introduced a family of advanced AM/FM receivers tuned for the high-end consumer and professional audio equipment market. The new Si477x AM/FM receivers provide industry-leading RF performance and exceptional configurability while reducing system cost and complexity for consumer audio/video receivers (AVRs), FM receiver monitors and pro-audio receivers.

To optimize audio performance, high-end consumer and pro-audio equipment makers typically build discrete AM/FM receiver designs from manually tuned inductors and multiple active components. These complicated, hand-crafted receiver designs result in limited configurability, fewer end-customer features, higher cost, and extensive manufacturing overhead and test time. The discrete approach also suffers from overload in strong signal environments, causing degradation in audio quality, particularly for weaker signals. In contrast, Silicon Labs’ highly integrated AM/FM receiver design improves robustness and delivers superior audio quality in all reception conditions while reducing system cost and complexity.

Silicon Labs’ Si477x family includes two feature-rich, single-chip devices: the Si4770, a global multiband AM/FM receiver, and the Si4777, an AM/FM receiver supporting HD Radio tuner functionality. Silicon Labs designed the Si477x receivers to reduce the bill of materials (BOM) for high-end consumer and pro-audio applications while enhancing design flexibility and delivering outstanding performance. The Si477x family leverages Silicon Labs’ patented digital low-intermediate-frequency (low-IF) architecture to deliver superior audio quality under the most demanding environments.

The Si477x family offers unsurpassed RF sensitivity, adjacent and alternate channel selectivity, linearity and audio fidelity through advanced DSP algorithms. With -3.5 dBµV sensitivity, the Si477x receivers can tune to signals down to 0.67 µV, picking up stations up to 100 miles away. Featuring a highly linear RF front end and sophisticated RF and IF automatic gain control (AGC) coupled with a state-of-the-art dynamic bandwidth control algorithm, the Si477x receivers optimize sensitivity and selectivity in strong signal environments, enabling outstanding reception at all times and conditions. The Si477x family’s best-in-class selectivity (65 dB at ±100 kHz and 72 dB at ±200 kHz frequency offset from the desired station) sets a new standard for tuning weaker stations buried among stronger ones in today’s crowded spectrum.

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