Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A microwave SAW stabilized oscillator, comprising: means for providing a closed loop having an integral multiple of 2π radians of phase shift and excess small signal gain at a frequency f o , said means comprising: an amplifier; and a SAW device having a frequency characteristic substantially equal to f o ; and means for extracting from said feedback circuit a signal having a frequency equal to nf o , where n is an integer greater than 1 and for preventing from being coupled from said feedback circuit a signal having the frequency component f o .
Claim 2
Dependent Claim
97 words
A microwave SAW stabilized oscillator, comprising: means for providing a closed loop having an integral multiple of 2π radians of phase shift and excess small signal gain at a frequency f o , said means comprising: an amplifier; and a SAW device having a frequency characteristic substantially equal to f o ; and means for extracting from said feedback circuit a signal having a frequency equal to nf o , where n is an integer greater than 1 and for preventing from being coupled from said feedback circuit a signal having the frequency component f o .
Claim 3
Dependent Claim
27 words
The oscillator of claim 1 wherein said extraction means further includes: means for preventing signals having a frequency of nf o from propagating around said feedback loop.
Claim 4
Dependent Claim
29 words
The SAW oscillator of claim 2 wherein said extraction means includes a parallel resonant circuit coupled to said feedback means having a resonant frequency equal to f o .
Claim 5
Dependent Claim
54 words
The SAW oscillator of claim 2, wherein: said extraction means includes a high pass filter coupled to the output of said feedback means having a cut-off frequency higher than the fundamental frequency f o of the loop means but lower than the selected harmonic frequency nf o coupled from the output of the oscillator.
Claim 6
Dependent Claim
126 words
A microwave SAW stabilized oscillator, comprising: an amplifier having an input and output; feedback means, disposed between the input and output of the amplifier, for providing a closed loop about said amplifier having an integral multiple of 2π radians of phase shift and excess small signal gain at a frequency f o , said feedback means comprising: a SAW resonator disposed to operate in a fundamental mode of operation having a resonant frequency substantially equal to f o ; and means for extracting from said feedback means a signal having a frequency component equal to nf o , where n is an integer greater than 1 and for preventing from being coupled from said feedback circuit a signal having the fundamental frequency component f o .
Claim 7
Dependent Claim
126 words
A microwave SAW stabilized oscillator, comprising: an amplifier having an input and output; feedback means, disposed between the input and output of the amplifier, for providing a closed loop about said amplifier having an integral multiple of 2π radians of phase shift and excess small signal gain at a frequency f o , said feedback means comprising: a SAW resonator disposed to operate in a fundamental mode of operation having a resonant frequency substantially equal to f o ; and means for extracting from said feedback means a signal having a frequency component equal to nf o , where n is an integer greater than 1 and for preventing from being coupled from said feedback circuit a signal having the fundamental frequency component f o .
Claim 8
Dependent Claim
29 words
The SAW oscillator of claim 5 wherein said extraction means includes a parallel resonant circuit coupled to said feedback means having a resonant frequency equal to f o .
Claim 9
Dependent Claim
53 words
The SAW oscillator of claim 5 wherein said extraction means includes a high pass filter coupled to the output of said feedback means having a cut-off frequency higher than the frequency f o of the feedback means and lower than the selected harmonic frequency nf o coupled from the output of the oscillator.