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7 Threads found on Disto
The circuit can basically work, but some points should be considered. LM324 has a GBW (gain-bandwidth product) of about 1 MHz, setting a gain of 1000 results in a signal bandwidth of 1 kHZ, I guess, that's not what you intend for an audio amplifier. Furthermore, LM324 has a class B output stage, that causes really bad crossover distortions, u
Hi, I presume that u wnt 2 simulate THD!! If so, Either u can try using distrortion analysis function in SPICE tools, In hspice its ".disto" , this will give better results only if there are no time varying signals. if you hve time varying signals thn do a transient simulation with appropriate inputs and take FFT.
It depends on the modulation you're using. Typically you can start from a simplified measurement model based on the AM/AM and AM/PM curves of the amplifier. For example if you know that you loose 0.5 dB for the bigger amplitude from the constellation, you compensate that by driving the amplifier with 0,5 dB extra. Same goes for phase distortion.
Laser distance meters should work in you application .. Some of them have serial port so if you use a microcontroller for something you can trig this device and read result via the RS-232 .. Try disto from LEICA .. Rgds, IanP
Hi, As far as accuracy goes, light (lasers) are probably the only real way to go. If you search google for Survyer 'total stations' you should get some results from Leica, Nikon, etc... Incidently, Leica manufactures the 'disto', something I used a lot for floor plans when I was a surveyer, I 'think' its good to 2mm (although some 0.5mm over 3
This CMFB circuit could accept differential input signal in magnitude less than 2*sqrt(2)*VDSAT where VDSAT is the saturation voltage if the diff pair NMOS. Without substrate effect the feedback target is ideal so there is no CMD level change if a pure differential signal is applied. But because of the substrate effect some CMD distortion is
Use .disto statement, you can get Intermodulation 3 product. I think it is called DIM3 or something..... Then you can get the main might get an intercept point between the Main signal and IM3 signal. Please refer to the HSPICE manual