Patents Assigned to Wavetek RF Products, Inc.
  • Digital peak/valley detector
    Patent number: 4990912
    Abstract: A peak-valley detector of an analog signal which provides a digital output of the analog signal. A digital counter is used having an output coupled to a digital-to-analog convertor. The output of the digital-to-analog convertor is compared to an input analog signal. The output of the comparator is used to control the input of a clock signal to the counter. A selective invertor controls whether the comparator's output allows counting for signals above or below the digital-to-analog convertor's output level.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: February 5, 1991
    Assignee: Wavetek RF Products, Inc.
    Inventor: Anthony P. Selwa
  • Hybrid frequency shift keying modulator and method
    Patent number: 4878035
    Abstract: A hybrid frequency shift keying modulator and method produces binary FSK by simultaneously applying a digital modulating signal to the DDS section of a frequency synthesizer along with a coordinated analog modulating signal as direct frequency modulation of the accompanying PLL section. Low frequency performance is derived from the characteristics of the DDS modulation and the high frequency performance and accurate wave shape reproduction are derived from the modulation of the direct FM section.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: October 31, 1989
    Assignee: Wavetek RF Products, Inc.
    Inventors: John A. Vendely, David M. Badger