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Contents
• Projects
• Eprom Wave Player
• CETH-60 Counter
• Preamplifier
• Prescaler : 1000 / 1.5 GHz
• Prescaler : 1000 / 12 GHz
• 10 MHz OCXO
• Function Generator (with XR2206)
• DDS Generator (with AD9851)
• VHF Airband Receiver with DDS
• HF Receiver with DDS
• Curve Tracer (simple)
• Curve Tracer (advanced)
• DCF-77 Signal Generator
• Homebrew Geiger Müller Counter
• Logarithmic Amplifier with AD8307
• GAIN - PHASE - ADAPTER USING THE AD 8302
• Power Supply
• PETH-20 Power Supply • +/- 15 V, 600 mA
• PETH-30 Power Supply
• PETH-40-HAM Power Supply • +/- 15 V, 1.5 A
• PETH-49 Power Supply • 1 ... 19 V, 2 A
• PETH-9910 Power Supply • 8 ... 16 V, 10 A
• Power Supply Designer
• VB 408 Replacement
• Artificial Ground
• Amplifier Design • Amplifiers
• MAR, ERA, GALI Amplifier Bias Calculator
• BJT Buffer Amplifier Designer (Collector Feedback Bias)
• BJT Buffer Amplifier Designer (Base Bias Network)
• BJT Buffer Amplifier Designer (Voltage Feedback Bias)
• BJT Buffer Amplifier Designer (Emitter Feedback Bias)
• Broadband VHF Power Amplifier, 3 ... 540 MHz, 1.5 W
• BJT Amplifier Bias Calc.
• FET Amplifier Bias Calc.
• Opamp Calculations
• Slew-Rate Considerations
• Antenna Design
• Bi-Quad Antenna Designer
• Cantenna Calculator
• Discone Antenna Designer
• HB9CV Antenna Calculator
• Helix Antenna Calculator
• Helix Antenna with Match Calculator
• Lambda/4 Groundplane designer
• Logarithmic Periodic Dipole Antenna Calculator
• Yagi Uda Antenna Designer
• J-Pole Antenna
• Wokatenna Design
• Dipole Construction
• Filter Design (AUDIO)
• 50 Hz / 60 Hz Notch Filter Designer
• Bainter Notch Filter Calculator
• Sallen-Key Lowpass
• Sallen-Key Highpass
• Bandpass Filter Design Guide
• Sallen-Key Bandpass
• Active Bessel Bandpass Filter 4th order
• Active Bessel Highpass • Lowpass Filter 12 dB/octave
• Active Bessel Highpass Filter 24 dB/octave
• Active Bessel Lowpass Filter 24 dB/octave
• Active Butterworth Highpass Filter 24 dB/octave
• Active Butterworth Lowpass Filter 24 dB/octave
• Active Butterworth Bandpass Filter 4th order
• Active Chebyshev Bandpass Filter 4th order
• Active Linkwitz Highpass Filter 24 dB/octave
• Active Linkwitz Lowpass Filter 24 dB/octave
• Simple Bandpass Filter
• Narrow Bandpass Filter
• Notch Filter
• Filter Design (RADIO)
• Butterworth Lowpass Filter
• Butterworth Highpass Filter
• Butterworth Bandpass Filter
• Butterworth Bandstop (Notch) Filter
• Chebyshev Lowpass Filter
• Chebyshev Highpass Filter
• Chebyshev Bandpass Filter
• Chebyshev Bandstop (Notch) Filter
• Combline Bandpass Filter Design
• Constant K Lowpass Filter
• Constant K Highpass Filter
• Constant K Bandpass Filter
• Crystal Filter Design
• Interdigital Bandpass Filter
• Components
• Attenuator
• Coax Calculator
• Diel. Coax Resonator
• Helical Coil Calculator
• Wire inductance Calculator
• Iron Powder Toroidal Coil
• Ferrite Toroidal Coil
• Heatsink Calculator
• Diplexer Bandpass
• Diplexer Lowpass
• Matching Network
• Broadband Impedance Matching with Transformer
• Wilkinson Power Split
• Coaxial Power Split
• Resistive Power Split
• Power Transformer Design :: EI • M Core
• Resistor Colour Code (Decoder:-) :: 4 RINGS
• Resistor Colour Code (Decoder:-) :: 5 RINGS
• Resistor Colour Code (Decoder:-) :: 6 RINGS
• Software
• RFSim99
• AppCad
• Mini Ring Core Calculator
• Datasheets, Manuals
• Datasheet Collection of our Projects
• HP Service Manuals
• Papers of Changpuak
• Engineering Formula Collections / Goodies
• PLL, VCO, Oscillator
• 4046 VCO Dimension
• PLL Loopfilter Designer
• PLL Loopfilter Designer V2
• NE 555 Oscillator
• NE 555 Monoflop
• RC HCT Inverter Oscillator
• Circuit Collection : Oscillators
• Tutorials
• Klirrfaktor
• Noise
• PLL Seminar
• PLL Seminar #1 - Theory
• PLL Seminar #2 - Loop Filter Calculations
• PLL Seminar #3 - Simulations with LTSpice
• Engineering Formula Collections / Goodies
• Troubleshooting
• UT803 :: Let's get serial
• Conversions
• Noise Figure • Temp.
• Power Conversion
• AWG • Metric Conversion
• VSWR • Return Loss
• Phase Noise to Phase Jitter Converter
• misc. Calculations
• Cascaded Noise Figure
• Find parallel Resistor
• Pathloss / RSSI
• Missmatch Loss
• IP3 / SFDR Calculator
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electronics
\ butterworth_bandstop.php - December 09 2011 20:44:53
Butterworth Bandstop (Notch) Filter Designer
Note: It is advantageous to have one end of the coils at ground !!!
Center Freq. [MHz]
Bandwidth [MHz]
Impedance [Ω]
Order [1-19]
First Element
shunt
series
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