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Ega pea pole prügikast! Tõsta enda õppeedukust ja õpi targalt. Telli VIP ja lae alla päris inimeste tehtu õppematerjale LOE EDASI Sulge
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Thd - Total harmonic distortion is the ratio of the root-mean-square (rms) value of the fundamental signal to the mean value of the root-sum-square of its harmonics (generally, only the first 5 harmonics are significant). 5. SFDR- Spurious free dynamic range is the ratio of the rms value of the signal to the rms value of the worst spurious signal (fake signal) regardless of where it falls in the frequency spectrum.
Homework 2 Solution
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The micro - processor interface to the AD7824 is similar to the Maxim MAX151, but with the addition of three address lines (A0–A2) to select which channel is to be converted. Like the MAX151, the AD7824 may be used in a mode where the microprocessor starts a conversion and is placed into a wait state until the con- version is complete.
Book Analog Interfacing to Embedded Microprocessors
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The run - up phase takes 400 μs. b) How long would it take for this ADC to complete the run-down phase? 𝑡𝑑𝑜𝑤𝑛 = (𝑉𝑖𝑛 ∙ 𝑡𝑢𝑝 )/ −𝑉𝑟𝑒𝑓 = 0,001 = 1𝑚𝑠 The run-down phase takes 1 ms. Question 8 What is the typical performance in terms of THD at a frequency of 500 kHz of:
Mikrokontrollerid ja robootika homework 2
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Tion information on one encoder edge (rising edge of “A”) instead of all four edges. You could compensate for this by using an encoder with more lines, but that may cost as much as a motor controller IC. You can double the resolution of this circuit by connecting both encoder channels to interrupts on the microcontroller.
Book Analog Interfacing to Embedded Microprocessors
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Tugevustingimus on täidetud 70 kordselt ja ilmselgelt pole nii suurt varutegurit tarvis ,kuid eesmärgiks oli kronstein konstrueerina ühtse tükina nii, et kronsteini korpus oleks viimane asi mis puruneks kuna remontimiseks oleks tarvis keevitusaparaati, ning kvalifitseeritud keevitajat, et asi parandada.
Kodutöö (plokiratas)
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Tagasilöögiklapid on pneumaatikakomponendid, mis võimaldavad õhu liikumist ainult ühes suunas, liikumissuuna muutumisel vastupidiseks klapp sulgub ja suleb õhu läbi- voolu. Õhu teekonna sulgemine võib toimuda kuuliga, klapiga või membraaniga, kas tänu rõhuvahele või täiendava vedru abil.
Pneumaatika: juhtimiskomponendid ja täiturid
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This three - element array eliminates the align- ment problems of the beam-splitter approach, and a single CCD with three arrays is less expensive than three single-line arrays of equivalent characteris- tics. Typical trilinear CCDs include the Kodak KLI series and the Sony ILX
Book Analog Interfacing to Embedded Microprocessors
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The pin on the microcontroller is also tied to the inputs of two compara- tors. A voltage divider sets the noninverting input of comparator A at 3v, and the inverting input of comparator B at 2v. By configuring the pin as an analog input, the reference value can be read.
Book Analog Interfacing to Embedded Microprocessors
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The ther - mistor resistance (from the table) at 50°C is 5758 W. Repeating the above cal- culation for this resistance results in a minimum pullup resistance of 2725 ohms. The original 1210 ohm value would cause too much dissipation at high temperatures.
Book Analog Interfacing to Embedded Microprocessors
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Turn - on and turn-off times of the phototransistor, there is a maximum mod- ulation frequency that will work—typically around 10 kHz. Since filtering the signal takes some time, it takes several cycles for a mechanical change in what-
Book Analog Interfacing to Embedded Microprocessors
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The forward - biased silicon PN junction is held constant, the forward drop decreases about 1.8 mV per °C. The Maxim MAX1617 is an IC that measures temperature using an external transistor, such as a 2N3904, as a temperature sensing element.
Book Analog Interfacing to Embedded Microprocessors
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Typical tol - erance for RTDs looks like this: Platinum: .01% to .03% Copper: .2% Nickel and nickel/iron: .5% Aside from better tolerance and overall lower resistance, the interface to an RTD is similar to that for a thermistor.
Book Analog Interfacing to Embedded Microprocessors
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The non - high-precision parts, such as the microprocessor, do not need to be controlled in this way. • The software must have sufficient storage or throughput to build a table or calculate compensation values.
Book Analog Interfacing to Embedded Microprocessors
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This 3 - switch DAC has 8 possible states and each voltage step is VR/8. We could add another R/2R pair and another switch to the circuit, making a 4-switch circuit with 16 steps of VR/16 volts each.
Book Analog Interfacing to Embedded Microprocessors
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Turned on in a unipolar motor, the motor shaft steps to the next rotation posi- tion. Typical step sizes for a stepper are 7.5° or 15°. A 7.5° stepper will have 360/7.5 or 48 steps per revolution.
Book Analog Interfacing to Embedded Microprocessors
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Traditional single - supply ADCs have operated from +5V and had an input range between 0v and 5v. Newer parts often operate at 3.3 or 2.7v, and have an input range somewhere between 0v and the supply.
Book Analog Interfacing to Embedded Microprocessors
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Tekkiv magnetväli on vastassuunaline esialgsele (kui α = 0°). Kui α = 270° on negatiivse maksimaalväärtusega i1 = –Im, see tähendab, et kulgeb mähise lõpust U2 mähise alguse U1 poole.
Elektrotehnika alused
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The fixed - count sampling method, which samples after a fixed number of encoder pulses (3, in Figure 5.18), avoids this problem and can give better precision in the result.
Book Analog Interfacing to Embedded Microprocessors
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The sigma - delta converter does not have a resistor ladder; the DAC in the feedback path is a single-bit DAC, with the output swinging between the two reference endpoints.
Book Analog Interfacing to Embedded Microprocessors
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The dual - slope converter takes a relatively long time to perform a conver- sion, but the inherent filtering action of the integrator eliminates noise.
Book Analog Interfacing to Embedded Microprocessors
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The velocity - measuring example just given would output a positive exponent for meters and a negative exponent for seconds, making a meters/second result.
Book Analog Interfacing to Embedded Microprocessors
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Thermistor self - heating than a system that must be accurate to ±.1°C. The formula for calculating the amount of self-heating dissipation allowed for a
Book Analog Interfacing to Embedded Microprocessors
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The open - loop gain falls off with increasing frequency, approaching 0 db (gain of 1) at around 10 MHz. As shown before, using actual gain versus
Book Analog Interfacing to Embedded Microprocessors
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The thermis - tor/resistor combination makes a voltage divider, and the varying thermistor resistance results in a varying voltage at the junction.
Book Analog Interfacing to Embedded Microprocessors
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This turns on transistors Q1 and Q4. One side of the motor will be more positive than the other; let’s say it is the left side for this example.
Book Analog Interfacing to Embedded Microprocessors
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The compara - tor then takes some amount of time to respond to the change in DAC voltage, producing a new up/down control input to the counter.
Book Analog Interfacing to Embedded Microprocessors
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The hctl - 1100 does not use an address- and data-register scheme, but instead multiplexes the address signals with 6 of the 8 data lines.
Book Analog Interfacing to Embedded Microprocessors
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The automo - bile voltage regulator may need to operate differently, with different PID parameters, at different motor speeds.
Book Analog Interfacing to Embedded Microprocessors
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The sigma - delta converter has become more commonly available with the ability to add a digital filter or DSP to the IC die.
Book Analog Interfacing to Embedded Microprocessors
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The hewlett - Packard HCTL-1100 is a single-motor controller with a 24-bit encoder counter and PWM or 8-bit digital outputs.
Book Analog Interfacing to Embedded Microprocessors
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Turned on and current flows from the positive supply, through Q1, through the motor winding, through Q3, and to ground.
Book Analog Interfacing to Embedded Microprocessors
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The 4 – 20 ma standard (Figure 10.1) uses the same pair of wires to power a remote sensor and to read the result.
Book Analog Interfacing to Embedded Microprocessors
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The teeth on the wheel produce changes in the magnetic field from the magnet, inducing an AC voltage on the coil.
Book Analog Interfacing to Embedded Microprocessors
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Teises mähises on vool negatiivne, see tähendab, et ta on suunatud mähise lõpust V2 mähise alguse V1 poole.
Elektrotehnika alused
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Taimeri töö - diagrammi määrab ära pneumojaoti tüüp ja möödavooluklapi ühendamise viis.
Pneumaatika: juhtimiskomponendid ja täiturid
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Typi - cally, the switch is left in the charge mode until V- reaches the input voltage.
Book Analog Interfacing to Embedded Microprocessors
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The open - loop gain of an opamp is high, usually in the tens or hun- dreds of thousands.
Book Analog Interfacing to Embedded Microprocessors
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Transitions on the SDA line while SCL is high are interpreted as start and stop conditions.
Book Analog Interfacing to Embedded Microprocessors
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Telje mõõtmed on toodud lisas 1. Kõige ohtlikum on telje lõige kronsteini seinte suhtes.
Kodutöö (plokiratas)
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Tingitud energiakadu nimetatakse hüstereesikaoks. Hüstereesisilmus võib olla erineva kujuga.
Elektrotehnika alused
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The ther - mistor is no longer connected to ground on the sensor circuit board.
Book Analog Interfacing to Embedded Microprocessors
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The one - shot “on” time may be too short to insure that this happens.
Book Analog Interfacing to Embedded Microprocessors
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The 5 - inch document width down to the 1-inch array length.
Book Analog Interfacing to Embedded Microprocessors
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The dual - slope design eliminates clock accuracy problems,
Book Analog Interfacing to Embedded Microprocessors
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That depend on the characteristics of the thermistor.
Book Analog Interfacing to Embedded Microprocessors
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The v - pin is a voltage divider with Vo and
Book Analog Interfacing to Embedded Microprocessors
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Tagasiside andur - reeglina potentsiomeeter
Servomootor Aruanne
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This condi - tion is called windup.
Book Analog Interfacing to Embedded Microprocessors

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