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Blogger

Arthur Schaldenbrand

As a Senior Technical Sales Leader with Cadence Design

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Measuring Bipolar Transistor ft with Fixed Base-Collector Voltage
Recently I had a question from reader. He asked a good question: "How do you to measure a bipolar transistor's ft when the base-collector voltage, Vbc, is fixed?" Attached is a modified version of the testbench that allows a user to measure   Read More »
Comments (2)
Measuring Fmax for MOS Transistors
The following question has come up in comments: "How do I measure F max for an MOS transistor?" The measurement methodology -- testbench, analysis, calculator setup, stimulus, etc.-- does not change whether you are measuring bipolar transistors   Read More »
Comments (1)
Measuring Transistor fmax
There were several questions about measuring transistor f max in comments posted to my previous Measuring Transistor f t and Simulating MOS Transistor f t blog posts. So in this posting we will look at simulating transistor s-parameters and device characteristics   Read More »
Comments (3)
Measure Twice, Cut Once for Transistor ft
Recently there was an inquiry about the methodology for performing the f t (transition frequency) versus Ic measurement described in my Measuring Transistor f t blog post from July 2008: By bid75 on September 8, 2010 I am unable to understand how ft vs   Read More »
Comments (2)
Analyzing Distortion With Spectre RF
Greetings, In the previous appends, we looked at using Shooting Newton Periodic Steady-State analysis to analyze analog circuits. In this append, we will look at using Harmonic Balance Periodic Steady-State, HBPSS, to analyze analog circuits. HBPSS is   Read More »
Comments (5)
Periodic Steady-State Analysis for DC-to-DC Converters
In " Spectre RF by any other name ...", a non-RF application for Spectre RF's periodic steady-state analysis was introduced. An example of using periodic steady-state analysis [PSS] to simulate the dynamic performance: THD and SFDR, of a   Read More »
Comments (9)
Spectre RF By Any Other Name ...
It has been a while since I last appende d , hope you are well! It was a little bit difficult to come up with a subject to write about and then recently I was in a meeting where we were talking about transient noise analysis. A designer was discussing   Read More »
Comments (6)
Simulating MOS Transistor ft
One other question that you might ask is, this approach works for bipolars but what happens when you need to characterize a MOS transistor. Nothing changes, use the same testbench and measurements, see figure 1. In this testbench a MOS transistor is being   Read More »
Comments (15)
Measuring Transistor ft
So let’s consider a practical example of creating test benches and performing measurements, starting with how to characterize a transistor. A couple of questions to consider before starting are: What parameters do you want to measure? What types   Read More »
Comments (9)
Senrinotabi
Greetings! My name is Art Schaldenbrand and I have been at Cadence for 12 years supporting the custom IC design tools in the Virtuoso platform. My interests tend to be as widely varied as the customers I work with, ranging from Wireless Design to CMOS   Read More »
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