SAW electric part and frequency conversion circuit

Details SAW electric part and frequency conversion circuit SAW electric part and frequency conversion circuit

1994-02-14

1995-04-25

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455339, 455340, 333193, 333155, 310313R, H04B 116, H01L 4108, H03H 925

Patent

active

054107423

ABSTRACT:
According to this invention, an SAW electric part includes an SAW filter and an SAW oscillator formed on a substrate having the same temperature characteristics as those of a substrate on which the SAW filter is formed. A frequency converter includes the SAW electric part, a second local oscillation circuit, a frequency converter, a first mixer, and a second mixer. The second local oscillation circuit oscillates a second local oscillation signal using the SAW oscillator. The frequency converter converts a frequency of the second local oscillation signal to generate a first local oscillation signal. The first mixer mixes the first local oscillation signal with an input signal to output a composite signal to the SAW filter. The second mixer mixes an output from the SAW filter with the second local oscillation signal to output a frequency conversion signal.

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Information Transmission, Modulation, and Noise, Misha Schwartz,.COPYRGT.1959, 1970, pp. 198-199, McGraw-Hill Book Company.

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