Browse Definitions :

peak-to-peak (pk-pk)

What is peak-to-peak (pk-pk)?

Peak-to-peak (pk-pk) is the difference between the highest and the lowest values in a waveform. In alternating current (AC) the peak-to-peak value is twice the peak value or 2.828 times the root-mean-square (RMS) value. Peak-to-peak voltage is indicated by VPP.

The difference between peak-to-peak, peak, amplitude and RMS

In alternating current (AC) power, the voltage goes up and down in a smooth sine wave. The voltage goes up to the maximum positive voltage, back down to zero, then to the maximum negative value, and back to zero to start over again. Because the voltage changes over time, there are various ways to express it depending on what aspect you are trying to emphasize.

Peak voltage, shown as VP, is the highest voltage value compared to zero volts. The amplitude is similar to the peak value as it expresses the highest value of the waveform. The peak and amplitude values are more used in waveform analysis, and less often with AC electrical work.

Peak-to-peak voltage, shown as VPP, is the difference between the highest and the lowest voltage values in AC. In AC applications, the peak-to-peak value will be two times the peak value. The peak-to-peak value is more used in waveform analysis or amplifier design, and less often with AC electrical work.

Common AC waveforms
Peak-to-peak is the difference between the highest and the lowest values in a waveform. A waveform represents how alternating current (AC) varies with time.

Root mean square (RMS) voltage, expressed as VRMS, is the direct current (DC) equivalent voltage of AC power. Because AC voltage goes up and down over time, it does not provide the peak maximum power all the time. The RMS value gives the effective voltage of AC power for wattage and other calculations.

For example, RMS is used when calculating Ohm's law for AC. Peak-to-peak value is equal to two times the square root of two times VRMS, or roughly 2.8284 times VRMS. RMS is most used in AC electrical work.

To illustrate the difference between peak, peak-to-peak and RMS voltage we can use standard North American residential power. Most people only know that it is 120 volts but might not know what type. It is 120 volts RMS (VRMS). This is handy for calculating power wattages of appliances.

120 VRMS is equal to 170 volts peak (VP), so up to 170 volts can come out of the wall. 170 VP is equal to 340 volts peak-to-peak (VPP), which is the difference between +170V and -170V.

Mathematically this can be expressed as:

VPP = 2 x VP = 2 √ 2 x VRMS

See also: resistance, ampere, impedance, reactance, oscilloscope

This was last updated in October 2022

Continue Reading About peak-to-peak (pk-pk)

  • network management system

    A network management system, or NMS, is an application or set of applications that lets network engineers manage a network's ...

  • host (in computing)

    A host is a computer or other device that communicates with other hosts on a network.

  • Network as a Service (NaaS)

    Network as a service, or NaaS, is a business model for delivering enterprise WAN services virtually on a subscription basis.

  • WebAuthn API

    The Web Authentication API (WebAuthn API) is a credential management application program interface (API) that lets web ...

  • Common Vulnerability Scoring System (CVSS)

    The Common Vulnerability Scoring System (CVSS) is a public framework for rating the severity of security vulnerabilities in ...

  • Dridex malware

    Dridex is a form of malware that targets victims' banking information, with the main goal of stealing online account credentials ...

  • audit program (audit plan)

    An audit program, also called an audit plan, is an action plan that documents what procedures an auditor will follow to validate ...

  • blockchain decentralization

    Decentralization is the distribution of functions, control and information instead of being centralized in a single entity.

  • outsourcing

    Outsourcing is a business practice in which a company hires a third party to perform tasks, handle operations or provide services...

  • team collaboration

    Team collaboration is a communication and project management approach that emphasizes teamwork, innovative thinking and equal ...

  • employee self-service (ESS)

    Employee self-service (ESS) is a widely used human resources technology that enables employees to perform many job-related ...

  • learning experience platform (LXP)

    A learning experience platform (LXP) is an AI-driven peer learning experience platform delivered using software as a service (...

Customer Experience
  • market segmentation

    Market segmentation is a marketing strategy that uses well-defined criteria to divide a brand's total addressable market share ...

  • sales pipeline

    A sales pipeline is a visual representation of sales prospects and where they are in the purchasing process.

  • market basket analysis

    Market basket analysis is a data mining technique used by retailers to increase sales by better understanding customer purchasing...