A 400MHz900MHz2'4GHz Multiband FSK Transmitter in 0'18mm CMOS

1
A 400-MHz/900-MHz/2.4-GHz Multiband FSK
Transmitter in 0.18-mm CMOS

• Advisor Tsung-Hsien Lin
• Student Po-Sheng Huang
• Date 2007/12/20
• Graduate Institute of Electronics Engineering
• National Taiwan University

2
Introduction and Motivation

• Motivation A low-power, small chip size, higher
  data rate, short-range device for
• ISM band 433/868 MHz, 902928 MHz, and 2.4 GHz.
• MICS band 402405 MHz
• Application
• Camera capsule
• Hearing aids with wireless capability
• Voice communication
• Sensor network
• Home automation

3
Multi-band FSK Transmitter Architecture
Wideband Mixer
IF/ 4 Phase
Analog Modulator
Transmitter Data
Driver
LO/ 4 Phase
2.4GHz 2.48GHz
VCO (1.422.6GHz)
402MHz405MHz
Fref
2
2
PFD
CP/LF
902MHz928MHz
/N

• Analog modulator with higher fdev and data rate.
• Wideband mixer supports MICS band ( 402MHz405MHz
  ) and ISM bands (433/868 MHz), ( 905MHz928MHz
  ), ( 2.4GHz2.48GHz).

4
Measurement Result and Die Photo
Analog Modulator
VCO Buffer
Loop Filter
Mixer
PA Driver
Charge Pump
Divider
SIPO