# PhD Candidate Kittipong Tripetch

**Committee:**International Scientific Committee of Electrical and Computer Engineering

**University:**Rajamangala University of Technology Suvarnabhumi

**Department:**Electronic and Telecommunication Engineering

**Research Fields:**grounded active inductor, floating active inductor, fully differential bandpass amplifier ,

## Publications

##### 3 CMOS Positive and Negative Resistors Based on Complementary Regulated Cascode Topology with Cross-Coupled Regulated Transistors

**Authors:**
Kittipong Tripetch,
Nobuhiko Nakano

**Abstract:**

Two types of floating active resistors based on a complementary regulated cascode topology with cross-coupled regulated transistors are presented in this paper. The first topology is a high swing complementary regulated cascode active resistor. The second topology is a complementary common gate with a regulated cross coupled transistor. The small-signal input resistances of the floating resistors are derived. Three graphs of the input current versus the input voltage for different aspect ratios are designed and plotted using the Cadence Spectre 0.18-µm Rohm Semiconductor process. The total harmonic distortion graphs are plotted for three different aspect ratios with different input-voltage amplitudes and different input frequencies. From the simulation results, it is observed that a resistance of approximately 8.52 MΩ can be obtained from supply voltage at ±0.9 V.

**Keywords:**
complementary common gate,
complementary regulated cascode,
current mirror,
floating active resistors

##### 2 Symbolic Analysis of Power Spectrum of CMOS Cross Couple Oscillator

**Authors:**
Kittipong Tripetch

**Abstract:**

**Keywords:**
Optimization,
power spectrum,
scattering parameter,
impedance
parameter

##### 1 Symbolic Analysis of Input Impedance of CMOS Floating Active Inductors with Application in Fully Differential Bandpass Amplifier

**Authors:**
Kittipong Tripetch

**Abstract:**

This paper proposes a study of input impedance of 2 types of CMOS active inductors. It derives 2 input impedance formulas. The first formula is the input impedance of the grounded active inductor. The second formula is the input impedance of the floating active inductor. After that, these formulas can be used to simulate magnitude and phase response of input impedance as a function of current consumption with MATLAB. Common mode rejection ratio (CMRR) of the fully differential bandpass amplifier is derived based on superposition principle. CMRR as a function of input frequency is plotted as a function of current consumption.

**Keywords:**
grounded active inductor,
floating active inductor,
fully differential bandpass amplifier

## Abstracts

##### 4 CMOS Positive and Negative Resistors Based on Complementary Regulated Cascode Topology with Cross-Coupled Regulated Transistors

**Authors:**
Kittipong Tripetch,
Nobuhiko Nakano

**Abstract:**

**Keywords:**
floating active resistor,
complementary common gate,
complementary regulated cascode,
current mirror

##### 3 Symbolic Analysis of Power Spectrum of CMOS Cross Couple Oscillator

**Authors:**
Kittipong Tripetch

**Abstract:**

**Keywords:**
Optimization,
power spectrum,
impedance parameters,
scattering parameter

##### 2 2 Stage CMOS Regulated Cascode Distributed Amplifier Design Based On Inductive Coupling Technique in Submicron CMOS Process

**Authors:**
Kittipong Tripetch,
Nobuhiko Nakano

**Abstract:**

**Keywords:**
CMOS regulated cascode distributed amplifier,
silicon transformer modeling with polynomial,
low power consumption,
distribute amplification technique

##### 1 Symbolic Analysis of Input Impedance of CMOS Floating Active Inductors with Application in Fully Differential Bandpass Amplifier

**Authors:**
Kittipong Tripetch

**Abstract:**

**Keywords:**
grounded active inductor,
floating active inductor,
fully differential bandpass amplifier