Title: Multiple band scanning radio

Abstract: To scan channels in a plurality of bands using a single first mixer, an FET transistor in an adaptive first mixer of the scanning radio, in response to a signal from a counter in the scanning local oscillator representing the frequency band of the channel being scanned, has: (1) its gate electrode connected to the output of a selected RF amplifier of a plurality of RF amplifiers for different bands; and (2) its source electrode electrically connected to receive local oscillations through a selected one of a plurality of different impedance networks. These connections enable the adaptive first mixer to maintain sufficiently high conversion gain when receiving signals on channels in any one of a plurality of different frequency bands.

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Inventors: Morgan, Eugene L. (Dix Hill, NY, US)

Application Number: 528920
Filing Date: 1974-12-02
Publication_date: 1976-02-24
Assignee: Hy-Gain Electronics Corporation (Lincoln, NB)
Primary Class(es): 455/168.1 455/180.1, 455/188.1
Other Classes:
US Patent Ref:

3348154	Oct, 1967	Fis, Jr. et al.	325/439.
3443230	May, 1969	Pratt	325/333.
3631348	Dec, 1971	Lehmann	325/458.
3801922	Apr, 1974	Muszkiewicz	325/459.
3845393	Oct, 1974	Basset	325/459.

Other Refs:
Primary Examiner: Libman, George H.
Assistant Examiner:
Attorney: Carney; Vincent L.