Wednesday, March 16, 2016

CA3140 and CA3130 Special Opamps

CA3140 and CA3130 are originally RCA part numbers( i feel). They are amazing close to ideal opamps, the input offset has to be trimmed. I used to use it when high input impedance is required. 1.5T ohm 10pA is the specs. A Electrometer can be made with just one opamp.

CA3130 has the additional Merit of swinging to the rails, if you are on a +/- 12V supply, the output will be +/-12V. This is a feature required in control applications.

These devices are now available with Intersil.

CA3140 -4.5MHz, BiMOS Operational Amplifier with MOSFET Input/Bipolar Output

The CA3140A and CA3140 BiMOS operational amplifiers feature gate protected MOSFET (PMOS) transistors in the input circuit to provide very high input impedance, very low input current, and high speed performance. The CA3140A and CA3140 operate at supply voltage from 4V to 36V (either single or dual supply).

Voltage regulator that uses CA3130

A voltage regulator that uses CA3130 - Range 0.1 to 50V at 1 Amp.
CA3130 - 15MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output

"15MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output
A CMOS transistor-pair, capable of swinging the output voltage to within 10mV of either supply-voltage terminal (at very high values of load impedance), is employed as the output circuit."

Applications - Ground-Referenced Single Supply Amplifiers, Fast Sample-Hold Amplifiers, Long-Duration Timers/Monostables.

Tuesday, March 15, 2016

WARP Speed IGBT - International Rectifier

IGBTs are voltage-controlled power transistors, that have higher current densities than equivalent high-voltage power MOSFETs.

WARP Speed IGBT - International Rectifier

IRG4PC40W IGBT IRF

IRG4PC40W - 600V Warp 60-150 kHz Discrete IGBT in a TO-247AC package

Features Include
  • 2 to 2.5 times the current density of MOSFETs 
  • Lower conduction losses at equivalent current rating compared to MOSFETs 
  • Reduced current tail for high frequency operation 
  • "Positive-only" gate drive 
Lower switching losses allow more cost-effective operation than power MOSFETs up to 150 kHz ("hard switched" mode)

Of particular benefit to single-ended converters and boost PFC topologies 150W and higher

Low conduction losses and minimal minority-carrier recombination make these an excellent option for resonant mode switching as well (up to >>300 kHz)

The IGBT in TO-247 delivers the same efficiency at full loadas the MOSFET in the larger TO-247 package.

Tuesday, March 01, 2016

Open Hardware and Product Designs

Product and Circuit Design Pages with Complete Projects accompanied by Circuits and Code.
Electronic Product Design

Open Hardware and Product Designs

Open Hardware Design many not be like Free Software. Free Hardware Designs existed even before Computers, Software or even free software came into being.

Radio Electronics carried one of the first free computer designs. You copy the circuit and build it. Like Woodwork Designs and plans in Popular Mechanics.

This is the way an Electronics design engineer or group see it, some may include gnu type freedom, it could be just open-source. It would also be like a creative commons type design. Then it would even be just like .....

Open Hardware and Product Designs

The Woodwork License

"I have given you the schematics, pcb and software you can build, improve and learn from it"

Open Hardware or Designs - Give Credits and Thanks

Do not claim them as your own, give the creator his due credit. Respect the rights of the creator and designer.

Some of the Designs are Application Notes, Evaluation Boards with Open Hardware. These may not be Open Source and some may be Copyright in design terms, still they are open designs.

The Electronic Design Difference

A free electronic design, like one that comes with a semiconductor application note or single board computer kit is not necessarily like open source but are still open designs.

Some Open Designs and Open Hardware are not Like FOSS or GNU but limited use and application. Still the Schematics, PCB and Firmware are Free to use, apply and learn.