22.4 to 44.8 MHz 4th order low pass filter

Overview

Low-pass filter (LPF) is the 4th order Butterworth filter with cut-off frequency adjustment. There are two modes for cut-off frequency programming: manually or automatically. In automatic mode one of the circuits is used in an oscillator mode therewith the oscillation frequency correlates with the LPF frequency. High third-order input intercept point is reached due to using a pseudodifferential circuit and Sallen-Key circuit.

Key Features

  • AMS SiGe BiCMOS 0.35 um
  • Low noise figure
  • Automatic low pass filter cut-off frequency adjustment system (LPF CFAS)
  • High linearity
  • Area 0.6 mm2
  • Portable to other technologies (upon request)

Applications

  • Radio receivers

Deliverables

  • Schematic or NetList
  • Abstract model (.lef and .lib files)
  • Layout view (optional)
  • Behavioral model (Verilog)
  • Extracted view (optional)
  • GDSII
  • DRC, LVS, antenna report
  • Test bench with saved configurations (optional)
  • Documentation

Technical Specifications

Foundry, Node
AMS SiGe BiCMOS 0.35um
Maturity
Silicon proven
Availability
Now
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Semiconductor IP