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US 5,530,402 AGranted
Single sequential amplifier circuit
AssigneeRF Monolithics, Inc.
InventorPeter V. Wright
Life of this patent
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Abstract
An RF signal amplifier comprising a single stage of amplification coupled through a first switch to the input of a SAW delay line and, after the SAW delay line is charged, through a second switch to the input RF amplifier for second amplification with the output of the RF amplifier being coupled through said first switch to an output terminal.
Claims10
An RF signal amplifier comprising:
- a signal input terminal and a signal output terminal;
- a single RF amplifier stage having an input and an output;
- a delay line having only one input and one output;
- controlled switch means for coupling an input signal on said signal input terminal directly to the input of said single RF amplifier stage for a first amplification and successively coupling the output of the single RF amplifier stage directly to said delay line input to temporarily store said amplified signal;
- and
- said controlled switch means subsequently coupling only the temporarily stored signal from the output of said delay line directly to said single RF amplifier input for a second amplification and only the second amplified output of the single RF amplifier to said output terminal.
3 more elements
An electrical RF signal amplifier comprising:
- a single RF amplifier stage having an input and an output;
- a first single-pole double-throw switch having first, second, and third terminals, the first terminal being coupled to the input of said RF amplifier for selectively coupling to either one of the second and third terminals;
- a SAW delay line having a single input and a single output;
- a second single-pole double-throw switch having first, second, and third terminals, the first terminal of the second switch being coupled to the output of said RF amplifier for selectively coupling to either one of the second and third terminals of the second switch;
- a signal input coupled to the second terminal of said first switch;
- the output of said SAW delay line being coupled to the third terminal of said first switch;
- a signal output line coupled to the second terminal of said second switch;
- the input of said SAW delay line being coupled to the third terminal of said second switch;
- and
- switch control means coupled to said first and second switches for coupling said signal input to said RF amplifier input to provide a first amplification of said signal and said RF amplifier output to said SAW delay line input to load said signal output of said RF amplifier into said SAW delay line and subsequently switching the output of said SAW delay line to the input of said RF amplifier and the output of said RF amplifier to said second terminal of said second switch to provide a second amplification of said signal with said single RF amplifier stage.
7 more elements
An RF signal amplifier comprising:
- a first RF amplifier stage having an input and an output;
- a single-port SAW delay line;
- a switch having contact means switchable between first and second positions;
- a second RF amplifier stage having an input and an output;
- switch control means for coupling the switchable contact means between the output of said first RF amplifier stage and said SAW delay line to charge said SAW delay line;
- and
- said switch control means, after the SAW delay line has been charged or loaded with said amplified signal, coupling said switchable contact means between the SAW delay line and the input to said second RF amplifier stage for allowing said stored signal to be reamplified in said second RF amplifier stage.
4 more elements
Dependencies are inferred from the claim text.