Abnormal filtering property based on the divergence of
... R is chosen to a large value( 50kOhm in our design). Z10 and − Z 9 are connected in parallel. The equivalent impedance is Zeq = Z 9 Z10 /( Z 9 − Z10 ) and its variation trend with frequency is shown in Fig.4. Note that the value of resistor R should be carefully selected so that it is significantly ...
... R is chosen to a large value( 50kOhm in our design). Z10 and − Z 9 are connected in parallel. The equivalent impedance is Zeq = Z 9 Z10 /( Z 9 − Z10 ) and its variation trend with frequency is shown in Fig.4. Note that the value of resistor R should be carefully selected so that it is significantly ...
Impedance Matching and Matching Networks
... between the source or RF energy and its load. This is especially important if you deal with low amplitude signals. Imagine a radio or TV antenna. To get a good reception every bit of this signal needs to be used and the designer can not afford any signal loss – a perfect match is desired. So the fir ...
... between the source or RF energy and its load. This is especially important if you deal with low amplitude signals. Imagine a radio or TV antenna. To get a good reception every bit of this signal needs to be used and the designer can not afford any signal loss – a perfect match is desired. So the fir ...
Feb 1998 Zero-Bias Detector Yields High Sensitivity with Nanopower Consumption
... examination of the 1N5712 at the origin reveals that it follows the ideal diode equation, with scales of millivolts and nanoamperes. To use a zero-bias diode at the origin, the external comparator circuitry must not load the rectified output. The LTC1540 nanopower comparator and reference is a good ...
... examination of the 1N5712 at the origin reveals that it follows the ideal diode equation, with scales of millivolts and nanoamperes. To use a zero-bias diode at the origin, the external comparator circuitry must not load the rectified output. The LTC1540 nanopower comparator and reference is a good ...
Homework 7 - Solutions
... g. What is the first time after t = 0 that v = 80 V? h. The sinusoidal function is shifted by 2/3 ms to the left along the time axis. What is the expression for v(t)? i. What is the minimum number of milliseconds that the function must be shifted to the right if the expression for v(t) is 80sin1000π ...
... g. What is the first time after t = 0 that v = 80 V? h. The sinusoidal function is shifted by 2/3 ms to the left along the time axis. What is the expression for v(t)? i. What is the minimum number of milliseconds that the function must be shifted to the right if the expression for v(t) is 80sin1000π ...
Resonance in RLC Circuits ~
... Theory: A resonant circuit, also called a tuned circuit consists of an inductor and a capacitor together with a voltage or current source. It is one of the most important circuits used in electronics. For example, a resonant circuit, in one of its many forms, allows us to select a desired radio or t ...
... Theory: A resonant circuit, also called a tuned circuit consists of an inductor and a capacitor together with a voltage or current source. It is one of the most important circuits used in electronics. For example, a resonant circuit, in one of its many forms, allows us to select a desired radio or t ...
FUNCTION GENERATOR NOTES
... Freq: Frequency in repetitions per second. In the case of a pulse, this parameter corresponds to the frequency at which repeated pulses are sent. Ampl: Amplitude (peak-to-peak), defined as the distance between the highest and lowest voltage points of a waveform. Offset: DC voltage offset. The time-v ...
... Freq: Frequency in repetitions per second. In the case of a pulse, this parameter corresponds to the frequency at which repeated pulses are sent. Ampl: Amplitude (peak-to-peak), defined as the distance between the highest and lowest voltage points of a waveform. Offset: DC voltage offset. The time-v ...
Standing wave ratio
In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave's amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line.The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced ""viswar""). For example, the VSWR value 1.2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1.2 times that of the minimum AC voltage along that line. The SWR can as well be defined as the ratio of the maximum amplitude to minimum amplitude of the transmission line's currents, electric field strength, or the magnetic field strength. Neglecting transmission line loss, these ratios are identical.The power standing wave ratio (PSWR) is defined as the square of the VSWR, however this terminology has no physical relation to actual powers involved in transmission.The SWR can be measured with an instrument called an SWR meter. Since SWR is defined relative to the transmission line's characteristic impedance, the SWR meter must be constructed for that impedance; in practice most transmission lines used in these applications are coaxial cables with an impedance of either 50 or 75 ohms. Checking the SWR is a standard procedure in a radio station, for instance, to verify impedance matching of the antenna to the transmission line (and transmitter). Unlike connecting an impedance analyzer (or ""impedance bridge"") directly to the antenna (or other load), the SWR does not measure the actual impedance of the load, but quantifies the magnitude of the impedance mismatch just performing a measurement on the transmitter side of the transmission line.