Design and implementation of a second order PLL based frequency synthesizer for implantable medical devices

In this paper, a low power 450 MHz frequency synthesizer for implantable medical device (IMD) is presented. A current-reuse LC voltage-controlled oscillator is used to lower the power consumption of the frequency synthesizer. A prototype is fabricated in a standard 130 nm CMOS technology with an active area of 0.099 mm(2). The design performance parameters are measured for different packaged prototypes and the performance is evaluated. The power consumption of the frequency synthesizer is 0.74 mW at an oscillating frequency of 450 MHz. The measurement results show a figure-of-merit (FOMpower) of 1.65 for a VDD of 1.2 V.

Automated summary

This paper presents a low power 450 MHz frequency synthesizer for implantable medical devices (IMD). A current-reuse LC voltage-controlled oscillator is used to reduce the power consumption of the frequency synthesizer. A prototype is fabricated using a standard 130 nm CMOS technology and its performance is evaluated. The power consumption of the frequency synthesizer is 0.74 mW at an oscillating frequency of 450 MHz. The measurement results show a figure-of-merit (FOMpower) of 1.65 for a VDD of 1.2 V.