1. Floating-Gate Circuits
Prof. Paul Hasler

2. Floating-Gate MOS Circuits

3. Floating-Gate Translinear Circuits
(MITE Networks)
Iout = I12 / I2
Other Applications:Amplifiers, Filters,
Log-Domain Filters, Sensor Interfaces
Developed by
B. Minch, et. al

4. Capacitor-Based Circuits
Resistor-Based Design
Capacitor-Based Design
Resistors and Inductors define the
circuit dynamics
Capacitors and Inductors define the
circuit dynamics
Capacitors are the natural elements
on silicon ICs

5. A Floating-Gate Technology for Digital CMOS ProcessesV1 Cf
Creates a DC Measurement
of classic C-V curves C2 V2 C3
Vout V3
Vref V4 C4
Gain = DVout/ DVin
= - C1 / Cf
Single-Poly FG Circuits: Brought to you by Brad and Paul

6. Floating-Gate MultiplicationV V dd dd 23 22 V V
nA)
tun
tun 21 V
dibl 20 + -
Output Current ( V V
W = 0
W = 0 in in 19
W = 0.35
W = -0.35
W = 0.70
W = -0.70 + - 18 I I
out
out 17
W = -1.40 I
W = 1.40
out
-0.5
-0.4
-0.3
-0.2
-0.1
0.1
0.2
0.3
0.4
0.5
Differential input (V)

7. Autozeroing Floating-Gate Amplifier (AFGA)

8. AFGA Frequency Response

9. Dynamics Range in the AFGA
AFGA Linear Range
AFGA Noise Spectrum

10. Floating-Gate Based Capacitor Sensor CircuitV t dd
out p M n C 2
Variable
Capacitor
0.2
0.4
0.6
0.8 1
1.2
1.4
1.6
1.8 2
2.9 3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
Tim
e ( s)
Smalle r
Decreas e
Decreasin g
Capacitance
Increasing
Increase
Pseudo-AFGA
circuit
AFGA
circuit

11. Autozeroing Second-Order Section

12. Autozeroing Second-Order Section

13. AutoSOS Frequency Behavior
AutoSOS Step Responses

14. Frequency Response and Harmonic Distortion

15. C4 (Capacitively Coupled Current Conveyors)
AFGA
Tunneling
Circuit
Injection
C4 Pseudo-AFGA
Hasler, Kucic, and Minch, Midwest 99

16. PAFGA Frequency Response10 1 2 3 4 5
Frequency (Hz)
Gain V t p = 2. 50 1V 56 7 .5 44 .6 0. 8 9
0.2