![]() ![]() and used for breadboards and circuit evaluation, and ESCC qualified (ES). Get a transistor power rating meter to measure the hfe of your trannies and by using really low hfe transistors you might get closer to that Ge sound. How to Simulate Silicon Carbide Transistors with LTspice Maby Robert Keim This article reviews the silicon carbide scene and then explains how to get SiC SPICE models and incorporate them into a simulation circuit. Infineons HiRel silicon bipolar transistor product range covers different. Ge cleans up from the guitar better than Si in general which can be difficult to replicate, but a tone control or some kind of treble snubber in the circuit can help a silicon pedal sound more Ge. It led the way for the creation of integrated circuits, microprocessors and computer memory. Germanium does have some sounds which are difficult to get from silicon but it's not impossible to get close enough. Amazingly, the first operational Transistor was declared 70 years ago, on December, 23 1947 1 The Transistor is probably one of the most revolutionary components ever invented. And no need for the reverse polarity chip either. Assume transistor is Silicon (a-0.98) IE Ic Rp 1.5 kQ Rc 1.2 kn VEE 8. I still need to modify the circuit a bit to roll-off some of the treble but by using a 2N2222A with an hfe under 160 I have made some great sounding Red Rooster pedals. Solution for Problem5: For the common base circuit shown in figure find I. My most successful use of Si instead of Ge has been in the Red Rooster (Chickenhead) treble booster. Of course with older transistors noise can become an issue, but if you replacing germanium perhaps not such an issue! 2) Hard diode clipping This is a very common way to create distortion. Unipolar transistors, such as JFETs and MOSFETs have a softer, more tube-like tone. Germaniums were used in the late sixties on the original Fuzz Face, for example. Germanium transistors have a little smoother sound. ![]() transistors are shown in photo 4.1, and symbols for schematics are on 4.2. Silicon transistors make a nasty, metallic sound. I've used some very old 2N3903s and 2N2222As. In this tutorial well introduce you to the basics of the most common transistor around: the bi-polar junction transistor (BJT). Silicon transistors are much more temperature-tolerant and much cheaper to. Even though transistor gates are now made of polysili-con, the name MOS has stuck. The rst such transistors used a metal wire for a gate, making the transistor a sandwich of metal, silicon dioxide, and the semi-conductor substrate. I have had good results in some circuits by subbing low-gain Si trannies for Ge. Figure 2-4 shows the cross-section of an n-type MOS transistor. Well Ge transistors leak, and that can be a big part of why some fuzz circuits work with Ge but not so well with Si. ![]()
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