Wideband square-law detector having a triangular frequency chara

Details Wideband square-law detector having a triangular frequency chara Wideband square-law detector having a triangular frequency chara

1995-02-14

1997-05-13

Chin, Wellington

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

359192, 375350, 329300, H03D 100

Patent

active

056299591

ABSTRACT:
A square-law detector which provides a square-law relationship between the amplitude of the input signal and the amplitude of the output signal, and having a frequency transfer characteristic which is a continuous function consisting of a rising portion up to a predetermined frequency followed by a falling portion following the predetermined frequency. Thus the frequency characteristic is generally triangular, which is advantageous in that the output signal as function of frequency has a much more uniform, i.e. trapezoidal, pattern than is obtained with a conventional detector having a substantially rectangular frequency transfer characteristic. This is especially important when the detector is used in a receiver for FSK modulated signals having a large frequency deviation, since the modulated signal spectrum then has two relatively discrete power peaks.

REFERENCES:
patent: 3729633 (1973-04-01), Eros et al.
patent: 4498197 (1985-02-01), Chown
patent: 4748642 (1988-05-01), Bertsche
patent: 4750217 (1988-06-01), Smith et al.
patent: 4888817 (1989-12-01), Ryu et al.
patent: 4972515 (1990-11-01), Shibutani
patent: 5144467 (1992-09-01), Kitajima et al.

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