A 44-MHz wideband switched-capacitor bandpass filter using double-sampling pseudo-two-path techniques

Author

Ng, Kenneth W H ; Cheung, Vincent S L ; Luong, Howard C.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China

Volume

40

Issue

3

fYear

2005

fDate

3/1/2005 12:00:00 AM

Firstpage

781

Lastpage

784

Abstract

A fully differential wideband sixth-order switched-capacitor bandpass filter is designed for channel selection in cable TV applications. A modified double-sampling pseudo-two-path technique is proposed to achieve a second-order wideband bandpass filter with a single opamp. Implemented in a standard double-poly four-metal 0.35-μm CMOS process and operated at 176-MHz sampling frequency, the filter achieves a measured center frequency of 44 MHz with a bandwidth of 6.28 MHz and a dynamic range of 58.3 dB at 3% IM3. The filter consumes 92.5mW at a single 3.0-V supply and occupies a chip area of 0.52 mm ².

Keywords

CMOS integrated circuits; band-pass filters; cable television; circuit tuning; switched capacitor filters; 0.35 micron; 176 MHz; 3 V; 44 MHz; 6.28 MHz; 92.5 mW; CMOS process; TV tuner; cable TV applications; channel selection; double-sampling pseudo-two-path techniques; second-order wideband bandpass filter; single opamp; wideband switched-capacitor bandpass filter; Band pass filters; Bandwidth; CMOS process; Cable TV; Dynamic range; Frequency measurement; Measurement standards; Sampling methods; Semiconductor device measurement; Wideband; Cable; TV tuner; channel selection; double-sampling; filter; high frequency; pseudo-; switched-capacitor filter; wideband;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2005.843601

Filename

1408099