Download presentation
Presentation is loading. Please wait.
1
Wireless data and power Brian McKinney Michael Vincent
2
What we are doing Ultimate goal is to create a device capable of precisely stimulating tissue in-vivo without connection to outside Lack of external connection implies IC needs to derive both power and data from RF signal
3
Test Bench Not a mixed signal IC but needed for simulation and testing purposes Generates random data Frames random data (e.g. start/stop and parity bits) Modulates carrier (ASK) with framed data
4
Regulator “Buck” type step down switching regulator
5
Ramp Generator
6
Comparator
7
Switch Side
8
Specifications TargetActual Vin (V)5 – 8~4.5 – 7 Vout (V)3.3~3.3 Power (mW)25~40 Efficiency (%)50~73 Fs (kHz)10050 C (uF)10.5 L (uH)11
9
Results
10
Data Path Envelope Detector Input: AM Signal (4MHz) Output: 100 Kbps “Dirty Data” Clock Recovery Input: 100 Kbps “Dirty Data” Output: 100 KHz Synchronous Clock Timing Control Inputs: 100 Kbps “Dirty Data” 100 KHz Clock Outputs: Clean Clock, Clean Data, Frame Strobe
11
Behavioral Simulation
12
Bandpass Filter
13
Delay-Lock Loop
14
PLL Theory
15
Phase Detector Operation clk = 0 data = 0 V out V DD clk = 0 data = -(¾) V out (¼)V DD clk = /2 data = 0 V out (½)V DD
16
VCO Current Starved VCO V out-filter range: 0 – V DD f min = 90 kHz f max = 105 kHz (½)V DD f typ = 100 kHz
17
Full Data Path Simulation
18
Conclusions and Q&A
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.