1 to 200 MHz 3rd order Low pass filter

Overview

The cell is the 3rd order Butterworth low pass filter with cut-off frequency adjustment in a wide range. There are 2 modes for cut-off frequency programming: manual and automatically. The generator is used to control filter cut-off frequency in an automatic mode. Generator oscillation frequency correlates with cut-off frequency which can be fixed by digital code ctrl<6:0>.
There are 4 operation modes with different rated signal level under the same value of distortion. Greater level of signal corresponds to a higher current consumption.
It is possible to use several LPF with one generator for multichannel systems.

Key Features

SMIC CMOS 0.18 um
Wide cut-off frequency adjustment range (1 MHz…200 MHz)
Low group delay time ripple vs. frequency (3.5 ns)
Low pass filter cut-off frequency adjustment system (LPF CFAS)
There are 4 operation modes
No external components required
Portable to other technologies (upon request)

Applications

Intermediate frequency signal processing
Navigation systems including multisystems

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

SMIC CMOS 0.18 um

Maturity

Silicon proven

Availability

Now

SMIC

Silicon Proven: 180nm G

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