Device for detecting the optimum anode load impedance of a tube

Details Device for detecting the optimum anode load impedance of a tube Device for detecting the optimum anode load impedance of a tube

1982-11-22

1984-10-09

Ng, Jin F.

Telecommunications

Transmitter

Measuring, testing, or monitoring of transmitter

455129, 333 17M, 343860, H04B 1700, H04B 104, H03H 738

Patent

active

044765789

ABSTRACT:
A device for detecting the optimum anode load impedence of a transmitter tube in a high frequency transmission chain. A phase shift circuit phase shifts by k.pi./2 (with k being a positive or negative uneven integer) the phase difference between the input and output voltages of the tube. The phase shifted voltages are multiplying together in a circuit, and the mean value of the product is then calculated. Cancellation of this mean value corresponds to the anode load impedance passing through a purely resistive value. Thus, the circuit allows the phase matching detection to be made, which is independent of any modulus matching detection.

REFERENCES:
patent: 3271684 (1966-09-01), Simon
patent: 3355667 (1967-11-01), Bruene
patent: 3786355 (1974-01-01), Midkiff
patent: 3919643 (1975-11-01), Templin
patent: 4209758 (1980-06-01), Skedkerud et al.

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