این مفهوم در شماتیک چه معنی میده؟

[vahid torabian]

سلام
مفهوم وازه ی vdd در شماتیک چیست؟

[سعيداذرسل خوي]

سلام
مفهوم وازه ی vdd در شماتیک چیست؟

پايه ورودي اي سي رو ميگنvdd .....

[vahid torabian]

پايه ورودي اي سي رو ميگنvdd .....
متوجه نشدم!
مگه ولتاژ نیست؟
مخفف چه کلمه ای است؟
با تشکر

[hooman21]

پ ن پ میشه ولتاژ پس vpp چی میشه

[vahid torabian]

پ ن پ میشه ولتاژ پس vpp چی میشه
دوست عزیز متوجه نمیشم چی نوشتید؟!:155fs505059:

لطفا اون چیزی که تو دبی و تایوان بهتون یاد دادن رو بگید تا ما هم استفاده کنیم!!!:reading:

[IRAN DATA]

پ ن پ میشه ولتاژ پس vpp چی میشه

پاناتل سایتی برای کمک و راهنمایی به همکاران و دوستان خود می باشد
لطفا اگر توانایی پاسخ به سوالات را دارید راهنمایی کنید و در غیر این صورت پست نزنید

این نوع پاسخ گویی باعث رفتن به حاشیه می شود

[IRAN DATA]

Vdd = V drain, drain

[hooman21]

Almost all integrated circuits ([Only registered and activated users can see links]) (ICs) have at least two pins that connect to the power rails ([Only registered and activated users can see links]) of the circuit in which they are installed. These are known as the IC's power supply pins. However, the labeling of the pins varies by IC family and manufacturer.
[Only registered and activated users can see links] ([Only registered and activated users can see links]) [Only registered and activated users can see links] ([Only registered and activated users can see links])
A generic labelled IC


Typical supply pin labeling BJT ([Only registered and activated users can see links]) FET ([Only registered and activated users can see links])


VCC VDD V+ VS+ Positive supply voltage VEE VSS V− VS− Negative supply voltage The simplest labels are V+ and V−, but internal design and historical traditions have led to a variety of other labels being used. V+ and V− may also refer to the inverting (−) and non-inverting (+) voltage inputs of ICs like op amps ([Only registered and activated users can see links]).
Sometimes one of the power supply pins will be referred to as ground ([Only registered and activated users can see links]) (abbreviated "GND"). In digital logic, this is nearly always the negative pin; in analog integrated circuits, it is most likely to be a pin intermediate in voltage between the most positive and most negative pins[citation needed ([Only registered and activated users can see links])].
Double subscript notation ([Only registered and activated users can see links]) uses similar looking placeholders with subscripts. In that notation the subscripted letters denote two points.
Contents

[hide ([Only registered and activated users can see links])]


1 History ([Only registered and activated users can see links])
2 Modern use ([Only registered and activated users can see links]_use)
3 References ([Only registered and activated users can see links])
4 External links ([Only registered and activated users can see links]_links)

[edit ([Only registered and activated users can see links])] History

In circuit diagrams and circuit analysis, there are long-standing conventions regarding the naming of voltages, currents and some components.[1] ([Only registered and activated users can see links]_note-AlleyAtwood-0) In the analysis of a bipolar junction transistor ([Only registered and activated users can see links]), for example in a common emitter ([Only registered and activated users can see links]) configuration, the DC voltage at the collector, emitter, and base (with respect to ground) may be written as VC, VE and VB respectively. Resistors associated with these transistor terminals may be designated RC, RE and RB. In order to create the DC voltages, the furthest voltage, beyond these resistors or other components if present, was often referred to as VCC, VEE and VBB. In practice VCC and VEE then refer to the plus and minus supply lines respectively in common ([Only registered and activated users can see links]) NPN ([Only registered and activated users can see links]) circuits. Note that VCC would be negative and VEE would be positive in equivalent PNP ([Only registered and activated users can see links]) circuits.
Exactly analogous conventions were applied to field-effect transistors ([Only registered and activated users can see links]) with their drain, source and gate terminals.[1] ([Only registered and activated users can see links]_note-AlleyAtwood-0) This led to VD and VS being created by supply voltages designated VDD and VSS in the more common circuit configurations ([Only registered and activated users can see links]). In equivalence to the difference between NPN and PNP bipolars, VDD is positive with regard to VSS in the case of n-channel FETs and MOSFETs and negative for circuits based on p-channel FETs and MOSFETs.
Although still in relatively common use, there is limited relevance of these device-specific power supply designations in circuits that use a mixture of bipolar and FET elements, or in those that employ either both NPN and PNP transistors or both n- and p-channel FETs. This latter case is very common in modern chips, which are often based on CMOS ([Only registered and activated users can see links]) technology, where the C stands for complementary meaning that complementary pairs of n- and p-channel devices are common throughout.
These naming conventions were part of a bigger picture where, to continue with bipolar transistor examples although the FET remains entirely analogous, DC or bias ([Only registered and activated users can see links]) currents into or out of each terminal may be written IC, IE and IB. Apart from DC or bias conditions, many transistor circuits also process a smaller audio-, video- or radio-frequency signal that is superimposed on the bias at the terminals. Lower case letters and subscripts are used to refer to these signal levels at the terminals, either peak-to-peak ([Only registered and activated users can see links]) or rms ([Only registered and activated users can see links]) as required. So we see vc, ve and vb as well as ic, ie and ib. Using these conventions, in a common emitter amplifier, the ratio vc/vb represents the small-signal voltage gain at the transistor and vc/ib the small-signal trans-resistance from which the name transistor is derived by contraction. In this convention, vi and vo usually refer to the external input and output voltages of the circuit or stage.[1] ([Only registered and activated users can see links]_note-AlleyAtwood-0)
Similar conventions were applied to circuits involving vacuum tubes ([Only registered and activated users can see links]) or thermionic valves as they were known outside of the U.S. Therefore we see VP, VK and VG referring to plate (or anode outside of the U.S.), cathode (note K, not C) and grid voltages in analyses of vacuum triode ([Only registered and activated users can see links]), tetrode ([Only registered and activated users can see links]) and pentode ([Only registered and activated users can see links]) circuits.[1] ([Only registered and activated users can see links]_note-AlleyAtwood-0)
[edit ([Only registered and activated users can see links])] Modern use

CMOS ([Only registered and activated users can see links]) ICs have generally borrowed the NMOS convention of VDD for positive and VSS for negative despite the fact that both positive and negative supply rails actually go to source terminals (positive supply goes to PMOS sources, negative supply to NMOS sources). ICs using bipolar transistors have VCC (positive) and VEE (negative) power supply pins.
In single supply systems (e.g., many simple digital and analog circuits) the negative power supply is also commonly referred to as GND. In "split rail" supply systems there are multiple supply voltages. Examples of such systems include modern cell phones, with GND and voltages such as 1.2 V, 1.8 V, 2.4 V, 3.3 V and PCs, with GND and voltages such as -5 V, 3.3 V, 5 V, 12 V. Power-sensitive designs often have multiple power rails at a given voltage, using them to conserve energy by switching off supplies to components which are not in active use.
More advanced circuits will often have pins carrying voltage levels for more specialized functions and these are generally labeled with some abbreviation of their purpose. For example VUSB for the supply delivered to a USB ([Only registered and activated users can see links]) device (nominally 5 V), VBAT for a battery, or Vref for the reference voltage for an analog-to-digital converter ([Only registered and activated users can see links]). Systems combining both digital and analog circuits often distinguish digital and analog grounds (GND and AGND), helping isolate digital noise from sensitive analog circuits. High-security cryptographic devices and other secure systems sometimes require separate power supplies for their unencrypted and encrypted (red/black ([Only registered and activated users can see links])) subsystems to prevent leakage of sensitive plaintext.

[hooman21]

اگه گویا نبود بگید توضیح بدم

[hooman21]

جسارتا ناظم من گفتم مزاحی کرده باشم سرگرم شن بچه ها اما حالا drain چی هست که گفتید

[saeed26gorgan]

با کسب اجازه از اساتید

بعضی از آی سی ها هستنند که در آنها از ترانزیستورهای fet استفاده شده . مثل cmos ها . همان طور که می دانید fet ها دارای سه پایه گیت g و درین d و سورس s می باشد . برای اینکه این ترانزیستورها در بایاس درست قرار بگیرند باید پایه درین آنها مثبت و سورس آنها منفی باشد . حالا پایه های تغذیه این آی سی ها را اصطلاحا vdd و vss نام گذاری می کنند . در نتیجه vdd باید مثبت و vss به منفی وصل شود . و vcc هم مربوط به آی سی هایی می باشد که در آنها از ترانزیستورهای معمولی استفاده شده مثل ttl . و cc یعنی ولتاژی که به کلکتور وصل می شود . که همان ولتاژ مثبت می باشد .

منبع:
[Only registered and activated users can see links]

[vahid torabian]

جسارتا ناظم من گفتم مزاحی کرده باشم سرگرم شن بچه ها اما حالا drain چی هست که گفتید

شما که سرچ کردن و کپی کردن رو خوب بلدید،در مورد drain هم همین کار رو میکردید،شاید به نتیجه میرسیدید!
drain(یکی از سه ترمینال متصل ترانزیستور نوع FET)

[hooman21]

شما که سرچ کردن و کپی کردن رو خوب بلدید،در مورد drain هم همین کار رو میکردید،شاید به نتیجه میرسیدید!
Drain(یکی از سه ترمینال متصل ترانزیستور نوع fet)
من متوجه نشدم
شما گویا خودتون پاسخ سوالتون رو داشتید حالا واسه چی پرسیدید من نمیدونم
واما کپی کردن ببین دوست عزیز چه این این سایت چه سایت های دیگه تمامی سولوشن ها و پاسخ هاشون کپی از سایت های منبع هستش من هم همینطور مهم واسه من این بود جوابتو بگیری ولی گویا قصد شما از طرح سوال چیز دیگری بوده اگه مشکلی با من دارید میتونید پیام خصوصی بذارید

[hooman21]

پاناتل سایتی برای کمک و راهنمایی به همکاران و دوستان خود می باشد
لطفا اگر توانایی پاسخ به سوالات را دارید راهنمایی کنید و در غیر این صورت پست نزنید

این نوع پاسخ گویی باعث رفتن به حاشیه می شود
ای به چشم قربان

[IRAN DATA]

کاربران گرامی لطف کنید و از بحث اصلی این پست غافل نشوید
پرداختن به مسائلی غیر از موضوع اصلی باعث به حاشیه بردن پست می شود