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Priority to ES0320048ApriorityCriticalpatent/ES320048A3/en
Publication of ES320048A3publicationCriticalpatent/ES320048A3/en
Improvements in ultra-short wave tuning devices, characterized in that the antenna input is applied inductively to a high-frequency amplifier stage, followed by a second amplifier step coupled by resistance-capacity, whose output, tuned, is coupled in turn capacitively to a band filter that limits the range of working frequencies, after which the heterodyne addition of the frequency produced by a very stable local oscillator takes place, to give rise to the resulting frequency, which the mixer and converter step allows to have at the output, already applicable to the input of a conventional type receiver. (Machine-translation by Google Translate, not legally binding)
ES0320048A1965-11-171965-11-17Improvements in ultracorted wave sunny devices. (Machine-translation by Google Translate, not legally binding)
ExpiredES320048A3
(en)
Frequency converting and selecting system including mixer circuit with field effect transistor coupled to band-pass filter through impedance inverting circuit
Improvements in the circuits of tuning, conversion, amplification and detection for television receivers. (Machine-translation by Google Translate, not legally binding)