Transistor Technologies for High Efficiency and Linearity
Imax depends on device size Maximum power dissipation depends on size and duty cycle - worse for CW tone than for high PAR signals . Tradeoff of Breakdown Voltage and ft To avoid breakdown, generally must limit peak electric field to below ... HEMT pHEMT Si GaAs InP GaN .
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Phase Locked Loop Circuits
web.ece.ucsb.eduClock generation: B. Razavi, Design of Analog CMOS Integrated Circuits, Chap. 15, McGraw-Hill, 2001. 1. Definition. A PLL is a feedback system that includes a VCO, phase detector, and low pass filter within its loop. Its purpose is to force the VCO to replicate and track the frequency and phase at the input when in lock.
ADS Tutorial Stability and Gain Circles ECE145A/218A
web.ece.ucsb.eduequations. The syntax is: gp_circle(S, gain, # points on circle) where S is the S-parameter matrix. Let’s illustrate. In the example below, a table is used to display frequency, maximum stable gain (MSG), the stability factor, k, and the magnitude of delta. The gain circles are at MSG (MaxGain1 in this case), and 1 and 2 dB below MSG.
Audio Amplifier Circuit - UC Santa Barbara
web.ece.ucsb.eduWeek #1: Audio amplifier Week #2: Microphone circuit The audio amplifier project is more difficult and time-consuming than the microphone pre-amp, so part of week #2 may be used to finish the audio amp. All breadboarding and testing can and should be done in lab. Soldering and hardwiring can and should be done outside lab.
Harmonic Balance Simulation on ADS
web.ece.ucsb.eduHarmonic Balance Simulation on ADS General Description of Harmonic Balance in Agilent ADS 1 Harmonic balance is a frequency-domain analysis technique for simulating nonlinear circuits and systems. It is well-suited for simulating analog RF and microwave circuits, ... function is driven to a given small value), then the resulting voltage ...
Quality factor, Q
web.ece.ucsb.eduWhen a resonant circuit is connected to the outside world, its total losses (let’s call them RP or GP) are combined with the source and load resistances, RS and RL. For example, Here is a parallel resonant circuit (C,L and RP)connected to the outside. The total Q of this circuit is called the loaded Q or QL and is given by
Latches, the D Flip-Flop & Counter Design
web.ece.ucsb.eduFebruary 6, 2012 ECE 152A - Digital Design Principles 2 Reading Assignment Brown and Vranesic 7Flip-Flops, Registers, Counters and a Simple Processor 7.1 Basic Latch 7.2 Gated SR Latch 7.2.1 Gated SR Latch with NAND Gates 7.3 Gated D …
Flip-Flops and Sequential Circuit Design
web.ece.ucsb.edu11 Latches and Flip-Flops 11.5 S-R Flip-Flop 11.6 J-K Flip-Flop 11.7 T Flip-Flop 11.8 Flip-Flops with Additional Inputs 11.9 Summary 12 Registers and Counters 12.5 Counter Design Using S-R and J-K Flip-Flops 12.6 Derivation of Flip-Flop Input Equations – Summary
BASICS OF THE SPECTRUM ANALYZER - UC Santa Barbara
web.ece.ucsb.eduFourier ⋅ π → − + + Now instead of a bank of narrow filters, we shall have one narrow filter centered at a fixed frequency, say fI, and we shall scan the signal spectrum across this filter by multiplying x(t) by a sinusoid of varying frequency f0. See Figure 1. …
Mealy and Moore Machines
web.ece.ucsb.eduFebruary 22, 2012 ECE 152A - Digital Design Principles 5 Finite State Machines Two types (or models) of sequential circuits (or finite state machines) Mealy machine Output is function of present state and present input Moore machine Output is function of present state only Analysis first, then proceed to the design of
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web.ece.ucsb.eduOne way to encode decimal digits using binary signals is to encode each of the digits 0-9 by means of its 4-bit binary representation. The resulting binary-coded decimal (BCD) representation is shown below:
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