Electricity: power supply or regulation systems – External or operator controlled – Using an impedance as the final control device
Patent
1980-08-25
1982-03-09
Beha, Jr., William H.
Electricity: power supply or regulation systems
External or operator controlled
Using an impedance as the final control device
333 81R, 340782, 455 92, G05F 302
Patent
active
043191843
ABSTRACT:
A remote control precision step attenuator for providing a desired amount of attenuation in the transmission channel of an audio signal. The attenuator includes a counter which provides a binary output count representative of the desired attenuation. An input applied to the counter can cause a stepwise increment or decrement to the output count of the counter. A control circuit responds to the binary output count in order to produce an attenuation control signal. Attenuation circuitry, coupled within the transmission channel is controlled by the attenuation control signal in order to apply the desired amount of attenuation into the channel. The attenuation circuit can be a resistance pad having sections each of which are switched into and out of the transmission channel by relays responding to the counter binary count output.
REFERENCES:
patent: 3011132 (1961-11-01), Hinrichs et al.
patent: 3243691 (1966-03-01), Gibson et al.
patent: 3858128 (1974-12-01), Mullin
patent: 4211956 (1980-07-01), Bloyd
Beha Jr. William H.
Miller Richard L.
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