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Monday, June 17, 2019

Reference Charts RF µWave Communications - Anritsu

These charts provide Band Designation, RF Measurements Conversion Tables, RF Spectrum Bands, RF Connector Comparison Tables, S-Paramaters, the Electromagnetic Spectrum, Waveguide Designation,

Power to Voltage Conversion, Spectrum Analyzer Conversion Factors, SWR ñ Reflection Coefficient ñ Return Loss, Power Measurements, Amplitude Modulation, Pulse Modulation, Frequency Modulation, and Bessel Functions. From - Anritsu Reference

Reference Charts RF µWave Communications - Anritsu

Reference Charts for RF & µWave Communications - Anritsu

"Conversion tables for return loss, reflection coefficicient, and SWR with values for interaction of a small phasor (utility reference) expressed in dB related to the reference.

In microwave circuit design S-parameters are very useful for the full characterisation of any 2 port network. In contrast to z,y and h-parameters, which require broadband short circuited and open circuited connections at the TEST ITEM for the measurement,

S-parameters are determined with input and output terminated with the resistive characteristic impedance of test systems (generally 50 ohms in a coaxial line system). Parasitic oscillations in active devices are minimised when these devices are terminated in resistive loads."

Sunday, June 02, 2019

100kHz Half Bridge Convertor - SG3525

This is a SMPS Circuit using SG3525 improved over the Application Note in the book SGS Motion Control Application Manual. This worked well. It helps you learn more about High Frequency Power Supply Design.

The PCB and Schematics have been listed below, PCB track thickness and reinforcements are critical. The transformer winding and isolation should be done in a professional manner.

Read about SG2525 - SG3525 - PWM SMPS Regulator Chip.

100kHz Half Bridge Convertor - SG3525

SG3525Voltage Mode PWM

SG2525 - SG3525 - PWM SMPS Regulator Chip. A second generation ic switch mode controller optimized for high frequency.

Saturday, June 01, 2019

Digital Circuits - PDF Circuits - delabs

These circuits are based on CD40xx Chips and other. You can use 74HCT or any other series that is available. use one family for a particular project. These were used nearly two decades ago. Use it for learning, glue logic or to interface your uC designs to external devices. Do not make only Logic based designs like some below. It would be better to use a uC, CPLD or FPGA if you are building a complex gadget Basic Digital Circuits

Digital Circuits - PDF Circuits - delabs

Digital Circuits - delabs

LM331 is a Voltage-to-Frequency Converters and 74C926 is a 4 Digit Counter. The first part of the circuit converts the amplified DC analog value from a shunt to pulses. The Second counts the pulses and Displays it on a Seven segment LED display.

Digital Timers, Counters and Clocks
  • Sequential Timer CD40xx
  • Sequential Timer 7217
  • Six Digit preset counter CD4518
  • Analog timer CD4541
  • Quad Presettable Timers
  • Digital Comparator 74HC85
  • Sequential Timer/counter 7217 with RAM
  • CD4060 and CD4020 based long duration timer.
  • Digital Timer Clock With Preset using Thumbwheel switch.
  • 1 Hz or 1 pps crystal clock using CD4060 and 32768 Hz Crystal
Mixed and Interface Circuits
  • Optical Proximity Switch
  • Profile Controller
  • Toaster timer 555
  • Quad analog input switch logic
  • Optical switch for water tap using LM555 and LM567
  • Diff input DS8830 to TTL convertor
  • Phase lock loop using 4046
  • Am hour meter for battery chargers or electroplating equipment. 74C926