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±5V, 250mA Dual Output Power Supply (Rev. A)
±5V, 250mA Dual Output Power Supply (Rev. A)

... Figure 6. VPOS Boost Converter Internal Block Diagram 8.3.1.1 Switching Frequency (VPOS) The boost converter switching frequency may vary slightly as the operating conditions change, but is typically around 1.7 MHz for most operating conditions. 8.3.1.2 Output Voltage (VPOS) The boost converter's ou ...
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... emit light energy. LED's offer several advantages over incandescent bulbs when applied to photoelectric controls. They can be rapidly turned on and off, are extremely small, consume very little power, and have an extremely long life (100,000 hours continuous). Also, since LED's are solid state devic ...
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... R2 adds several terms that can, if you are not careful, dominate over the en term. So if a low noise amplifier was selected for its noise, setting R2 consistent with that will retain the original intent. R3 will also add noise in a similar fashion to R2 – it will turn out that setting R3 ≈ R2 is goo ...
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Heterodyne



Heterodyning is a radio signal processing technique invented in 1901 by Canadian inventor-engineer Reginald Fessenden, in which new frequencies are created by combining or mixing two frequencies. Heterodyning is used to shift one frequency range into another, new one, and is also involved in the processes of modulation and demodulation. The two frequencies are combined in a nonlinear signal-processing device such as a vacuum tube, transistor, or diode, usually called a mixer. In the most common application, two signals at frequencies f1 and f2 are mixed, creating two new signals, one at the sum f1 + f2 of the two frequencies, and the other at the difference f1 − f2. These new frequencies are called heterodynes. Typically only one of the new frequencies is desired, and the other signal is filtered out of the output of the mixer. Heterodynes are related to the phenomenon of ""beats"" in acoustics.A major application of the heterodyne process is in the superheterodyne radio receiver circuit, which is used in virtually all modern radio receivers.
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