Boots – shoes – and leggings
Patent
1978-08-10
1981-02-24
Krass, Errol A.
Boots, shoes, and leggings
324 77B, 340709, 340711, 364487, 364518, G01R 2300
Patent
active
042531527
ABSTRACT:
An input signal is mixed with sampling signals from oscillators which vary the frequency of the sampling signal from a first frequency to a second frequency. The resulting Intermediate Frequency (IF) signal is processed and digital values are stored in a memory in response thereto. Waveforms are then displayed which correspond to these frequency and amplitude values. Various input and display circuits facilitate the display and interpretation of these waveforms.
REFERENCES:
patent: 3427536 (1969-02-01), Wainwright
patent: 3786351 (1974-01-01), Priebe, Jr.
patent: 3881097 (1975-04-01), Lehmann et al.
patent: 3974493 (1976-08-01), DeCavaignac et al.
patent: 4063223 (1977-12-01), Schlig et al.
"A 5 MHz Digitally Controlled Spectrum Analyzer", Tekscope(USA), vol. 7, No. 3, 1975, pp. 3-7.
Boone David A.
Hewlett--Packard Company
Krass Errol A.
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