# Bondwire inductance calculator

By | 05.10.2020 Even a simple length of wire can exhibit inductance, or rather, self-inductance. This tool is designed to calculate the inductance of a length of wire given its diameter and length. Note that self-inductance of a wire is often not measured since it is only a part of a circuit's loop. To use this calculator, just enter the diameter and length of the wire.

You can select the unit of measurement for the diameter and the length. The output inductance is presented in nano henries 10 -9 H. A wire can be found in any circuit, and thus, it is important to know how much inductance it is contributing. In contrast, a loop inductance can be measured. In Partnership with TE Connectivity. Don't have an AAC account? Create one now.

Forgot your password? Click here. Latest Projects Education. Tools Wire Self Inductance Calculator. Wire Self Inductance Calculator This calculator will help compute the inductance of a length of wire. Inputs Diameter of Wire.

Length of Wire. Wire Self Inductance:. Overview Even a simple length of wire can exhibit inductance, or rather, self-inductance. Grover Applications A wire can be found in any circuit, and thus, it is important to know how much inductance it is contributing.

You May Also Like. Log in to comment. Sign In Stay logged in Or sign in with. Continue to site.Even a single, straight piece of wire has some inductance! We generally associate inductance with a loop or coil of wire. However, even a straight piece of wire, or your electrodehas some self-inductance.

My good, old edition of the CRC Handbook is a wealth of information! It contains a section on " Radio Formulae " ref 1 that gives the inductance of a straight piece of round wire or rod:. How useful was this information? Uses JavaScript.

### Straight Wire Inductor - Self inductance of Straight Wire

You must have a JavaScript capable browser, and have scripting enabled. Download the newest Internet Explorer or Firefox now! This calculator requires JavaScript but your browser does not support it, or scripting is disabled! The calculator, above, actually uses a slightly more complicated form of the equation ref 2. Note: This equation applies to an isolated round wire far from a ground plane or earth.

For other geometries, see references 2 or 4. More About More About EIS. Yes, I got it NEW. Grover, Dover Publications, All rights reserved. The Inductance of Your Electrode!

The Basics of Inductance

Home What's New?An integrated circuit on a die is connected to external world through bond wires. Depending on the packaging or assembly technique we use, the bond wire length changes. The self or mutual inductance of the bond wire is directly proportional to length and have a great impact on the performance of RFICs. Self inductance of a wire with rectangular cross-section is given by [ 1 ].

If and are the self inductances of wires andthen mutual inductance between two wires is given by where, k is magnetic coupling factor.

Rules of thumb for design calculations : self inductance of lead frame self inductance of a bondwire is. Typical values of bond-wire inductance, capacitance and resistance can be found here [ 2 ].

At very high frequencies skin effect comes into effect, and resistance at high frequencies is much higher than DC resistance. The following slides[ 3 ] show the modeling results of self and mutual inductance and capacitance along with DC and AC resistance of a 1-mil bondwire. In a multi-segment bond wire, the self-inductance of entire wire is sum of self-inductance of each segment and mutual-inductance among the segments. Bond wire modeling guidelines [ 45 ]. Fusing currents [ 7 ] The current carrying capability of a bond wire changes with size of the wire and material used for it. The bond pad requirement also changes with the selection bond wire size.

Here is a reference with some numerical info to select bond wire size, material and bond pad[ 8 ]. If and are the self inductances of wires andthen mutual inductance between two wires is given by where, k is magnetic coupling factor Rules of thumb for design calculations : self inductance of lead frame self inductance of a bondwire is Typical values of bond-wire inductance, capacitance and resistance can be found here [ 2 ] At very high frequencies skin effect comes into effect, and resistance at high frequencies is much higher than DC resistance.

Here is a reference with some numerical info to select bond wire size, material and bond pad[ 8 ] Characteristic Impedance of Integrated Circuit Bond Wires [ 9 ] Bibliography  E.

## Wire Self Inductance Calculator

Knecht, B. Gonzalez, and K. Leave a Comment Cancel reply.This Index is for Radio Frequency and Microwave calculators. They follow a constant theme which is designed to make them simple and intuitive to use. Further calculator information is available in About our calculators. Amplifier dc Conditions Determines the dc conditions of a variable configuration amplifier.

Matching Pi Attenuator A two part calculator which gives ideal and preferred value resistors, showing most formulas used and a link to the others. Matching T Attenuator A two part calculator which gives ideal and preferred value resistors, showing most formulas used and a link to the others.

Microstrip Characteristic Impedance Uses a formula from an article by Rick Hartley and shows the formula used. This is used for making relative dielectric constant measurements using a Vector Network Analyser. Relative Dielectric Constant Calculator for a Circular Capacitor Based on a formula by Kirchhoff for a circular capacitor, showing the equations used. Return loss and mismatch loss Active return loss and mismatch calculator with results for absolute impedance, return loss, VSWR, reflection coefficient and mismatch loss.

Round Wire ac Resistance Gives the ac resistance of a round straight wire using common conducting materials. Round Wire Impedance Gives the impedance of a round straight wire using common conducting materials. Round Wire Inductance Gives the inductance of a round straight wire using common conducting materials. Round Wire dc Resistance Gives the dc resistance of a round straight wire using common conducting materials. Schmitt Trigger A two part calculator which gives ideal and preferred value resistors, showing formulas used.

Skin Effect Depth Calculates the skin effect depth for copper at a particular frequency. Spreadsheet An Excel spreadsheet with many simple calculations in 'blocks' that can be built up into fairly complex calculations by simply making the input cell of any block equal to the result of any other block.

May take two or three goes before it will download! Further calculator information is available in About our calculators ac Networks A useful collection of calculators giving the impedance and reactance of simple ac networks. Send email using the Contact Us page with questions about our products or comments about this web site. Return to Home page.Devices used in electronic circuits to store energy in form of magnetic field an ideal inductor is equivalent of short circuit. Enter the required values and calculate straight wire inductance. Online calculators and converters have been developed to make calculations easy, these calculators are great tools for mathematical, algebraic, numbers, engineering, physics problems. Easy and convenient to use and of great help to students and professionals. Found any bugs in any of our calculators? Please report us at support brainmeasures.

Have Something to say about site, or just want to say hello, get in touch at feedback brainmeasures. Follow Us :. Online Calculators. Electrical Calculators. Straight Wire. To calculate Straight Wire Inductor:. About OnlineCalculators Online calculators and converters have been developed to make calculations easy, these calculators are great tools for mathematical, algebraic, numbers, engineering, physics problems. Report a Bug Found any bugs in any of our calculators? Feedback Have Something to say about site, or just want to say hello, get in touch at feedback brainmeasures. Home Online Straight Wire Inductance Calculator Straight Wire Inductor - Self inductance of Straight Wire Devices used in electronic circuits to store energy in form of magnetic field an ideal inductor is equivalent of short circuit.Basic Theory - using 21st-Century technology to design vacuum tube preamps, power amps, and power supplies.

System Design - a professional methodology for crafting a complete guitar amplifier. Copper is not a perfect conductor. On the contrary, wires have a certain amount of resistance that increases with length and decreases with diameter. If we wind a wire into a coil it obviously creates inductance, but even a straight piece of wire or a component lead has some parasitic inductance caused by the magnetic field that it creates. The amount of reactance the inductance creates is directly proportional to frequency.

The calculator computes this reactance for various gauges of hookup wire. It assumes that the wire is perfectly straight and that current is evenly distributed throughout the copper metal, which is approximately true for audio frequencies. At higher frequencies there is appreciable skin effect, where most of the current travels on the wire surface, and under these conditions the inductance and the reactance are less. For audio applications, particularly in vacuum-tube amplifiers, it's important to note the units: milliohms, micro-ohms, and microhenries.

## Round Wire Inductance Calculator

In the context of guitar amp components measured in kilo-ohms and henries, these quantities are quite small. For radio-frequency and lightning-protection applications, on the other hand, a few milliohms can go a long way. Guitar Amplifier Electronics: Basic Theory - a 21st-Century approach to understanding preamp, power amp, and power supply design.

Fundamentals of Guitar Amplifier System Design - a structured methodology for crafting an awesome guitar amplifier!

Basic Theory - using 21st-Century technology to design vacuum tube preamps, power amps, and power supplies System Design - a professional methodology for crafting a complete guitar amplifier Circuit Simulation - modeling vacuum tube guitar amplifiers using SPICE.

What does this calculator do?Extra parasitics introduced by bond wires in the form of inductance in series with resistance is characterized accurately at selected frequencies to achieve the desired performance. Moreover, the number of bond wires, their height from substrate, frequency, and dimensions play an important role in overall circuit performance especially at high RF frequencies. Theoretical equations predicting behavior along with examples, are presented to choose the optimum number of bond wires.

Most RF and microwave circuits and subsystems use bond-wires to interconnect components such as lumped elements, planar transmission lines, solid state devices and integrated circuits ICs .

The main parameter of bond-wires is the associated inductance which contributes significantly at higher RF frequencies. Bond wire is considered an extra inductance in circuit level simulation. It is also employed in hybrid MICs to make connections from the innermost section of the printed inductor  or connecting active devices. Optimizing performance of MICs is partially accomplished by extending or trimming the bond wire connection between the components.

Bond wire can be single or multiple which is chosen depending on applications. Usage of multiple bond wires also provides redundancy in case of breakage of a single wire. Published literature generally deals with multiple bond wires with consideration for reliability and current carrying capability. This article illustrates how bond wires are modeled and provides approaches for determining the optimum number of bond wires. Compared to ribbon, bond wire has inherent advantage of higher quality factor with the ribbon width equals to wire.

Further the selection of the bond pad is of utmost important as the capacitance associated with the pad should not resonate with the inductance of the wire at the frequency of operation resulting in performance degradation.

Simple lumped model incorporating the inductance value, series and radiation resistance along with stray capacitance is proposed in the article. Further incorporation of the bond wires in packages and optimum selection for meeting the RF performance is detailed in this article. Bond wires primarily introduce inductance at high radio frequencies which must be taken into design consideration.

The equivalence of a bond wire is the lumped inductance in series with the resistance. Multiple bond wires are also employed in some applications for reliability criteria but in case of RF it is linked with the reduction of inductance and resistance. Also, the associated inductance and resistance value of the bond wire varies with frequency. The effect of self-inductance and multiple wire mutual inductance is also significant at higher frequencies. The inductance associated with the bond wire depends on:.

Generally gold material is chosen as it has higher fusing current compared to copper and aluminium.

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