Double Convergence Younger

Abstract

Abstract PURPOSE:To reduce interference beat by adding a tuning circuit including an air- core coil having the capacity for balance adjustment to the 1st mixing circuit and allowing the 1st mixing circuit to adjust the circuit balance so that the oscillated output from the 1st local oscillating circuit is not leaked to the 2nd mixing circuit. CONSTITUTION:Coils 8a, 8b for intermediate frequency tuning in common use for balance adjustment are provided respectively to a double balance mixer so as to attenuate the leak of local oscillation output and attain ideal balancing without causing theoretically a loss. A tuning circuit comprising capacitors 7a, 7b for intermediate frequency tuning and the coils 8a, 8b for tuning is provided after a ring circuit because any inductance in the ring circuit constituting a mixing circuit causes a loss to attain the broad band tuning form tuned to the intermediate frequency.

Inventors

• 👤 Seiya Asai
• 👤 浅井　誠也

Bibliographic Details