Datenblatt-Suchmaschine für elektronische Bauteile |
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KM103AI Datenblatt(PDF) 5 Page - Cadeka Microcircuits LLC. |
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KM103AI Datenblatt(HTML) 5 Page - Cadeka Microcircuits LLC. |
5 / 6 page REV. 1A January 2004 5 KH103 DATA SHEET with a 70kHz square wave large enough to produce a transition from +5V to -5V at the KH103 output and adjusting Rb until the output of U1 is at a minimum. Ra should be about 9.5Rg for bad results; thus, Rb should be adjusted around the value of 0.5Rg. Figure 3: Non-Inverting Gain Composite Amplifier to be Used with Figure 1 Circuit Figure 4: Inverting Gain Composite Amplifier to be Used with Figure 2 Circuit Bias Control In normal operation, the bias control pin (pin 16) is left unconnected. However, if control over the bias of the amplifier is desired, the bias control pin may be driven with a TTL signal; a TTL high level will turn the amplifier off. Distortion and Noise The graphs of intercept point versus frequency on the page 3 make it easy to predict the distortion at any fre- quency, given the output voltage of the KH103. First con- vert the output voltage Vo to Vrms = (Vpp/2√2) and then to P = (10log10 (20Vrms2)) to get the output power in dBm. At the frequency of interest, its 2nd harmonic will be S2 = (I2 - P) dB below the level of P. Its third harmonic will be S3 = 2(I3 - P) dB below the level of P, as will the two-tone third order intermodulation products. These approxima- tions are useful for P < -1dB compression levels. Approximate noise figure can determined for the KH103 using the Equivalent Input Noise graph on page 3. The following equation can be used to determine noise figure (F) in dB. where vn is the rms noise voltage and in is the rms noise current. Beyond the breakpoint of the curves (i.e. where they are flat) broadband noise figure equals spot noise, so ∆f should equal one (1) and v n and in should be read directly off the graph. Below the breakpoint, the noise must be integrated and ∆f set to the appropriate band- width. |
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Ähnliche Beschreibung - KM103AI |
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