PnP


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PNP

(electronics)
A type of bipolar transistor consisting of a layer of N-doped semiconductor (the "base") between two P-doped layers (the "collector" and "emitter"). PNP transistors are commonly operated with the emitter at ground and the collector at a negative voltage.

In the 1960s, the germanium PNP transistor was the cheapest and best for use at ordinary temperatures. The leakage current from collector to base in this type of device is larger than for the silicon transistor, and also varies more with temperature. The effect of these deficiencies can be lessened by proper biasing and feedback, which can make the circuit both serviceable and reliable. Neither germanium nor PNP transistors are as common today.

The voltages used on a PNP transistor are inverted when compared with vacuum tubes. Further, the behaviour of vacuum tubes is usually described in terms of voltages whereas transistors are better described in terms of current.

PNP

(architecture)

PnP

(1) See Plug and Play.

(2) (PNP) (Positive Negative Positive) See PN junction.
References in periodicals archive ?
In a viber message, PNP spokesman Bernard Banac said the PNP's Integrity Monitoring and Enforcement Group has already started its probe of the pending administrative cases.
'As part of the institutionalized transformation program of the PNP to attain a highly capable, effective and credible police service, it is imperative that all our PNP personnel will be transformed from within with sound moral and spiritual values,' Rosaroso said.
Extortion remains the biggest offense for "vulnerable" police officers, the PNP chief said.
We want to probably have an audience and probably kung hindi man nila matigil yun e mabago man lang yung pagpoportray sa PNP," said Albayalde.
The relief of the entire 1,000-member Caloocan police force last year following the killings of two teenagers and a warrantless raid and robbery by the police that was caught on video confirmed the presence of scalawags among the 175,000-strong PNP and highlighted the need for police reform.
The PNP Lateral Entry Board is now making initial preparations for the processing of applications for lateral entry of technical service officer candidates.
Total hepatic messenger ribonucleic acid (mRNA) was extracted using affinity columns (Qiagen) from adult male sheepshead minnows treated by aqueous exposure to either 65.14 ng/L [E.sub.2], 109 ng/L E[E.sub.2], 100 ng/L DES, 11.81 [micro]g/L PNP, 590.3 ng/L ES, 5.59 [micro]g/L MXC, or triethylene glycol (vehicle control) using a flow-through dosing apparatus as described previously (Folmar et al.
Police said Valdez joined PNP in 2007 but went on Absent Without Official Leave (AWOL) status in 2014 due to his alleged illegal drug use.
'These equipment are expected to enhance the basic operational requirements of PNP units, especially city and municipal police stations, public safety battalions and company, and national support units,' Albayalde said.
Although the PNP started using the new rank classification last Feb.
He added that he will actively seek the local leaders' support in carrying out the PNP's programs and thrusts.
The retirees said the automatic deductions from their monthly pensions are being effected by the PNP through its Automatic Pension Deduction Scheme and are made in favor of PNP-accredited multipurpose cooperatives (MPCs) and savings and loans associations (SLAs).