Back to results
US 8,766,082 B2Granted
Amplifier with selectable master control
AssigneeMesa/Boogie, Ltd.
InventorRandall C. Smith
Life of this patent
Estimating the term…
Abstract
An amplifier for electric guitar including a Cut control for attenuating high frequencies whose operation is expanded via a switch to alternately function as a Master Volume control.
Claims13
An amplifier for guitar comprising:
- a push-pull amplifier having at least one pair of first and second electron emitting devices, each electron emitting device including an electron source element, an electron receiving element and an electron control element;
- a double-pole switch having a first and second position, and comprising a first segment and a second segment, wherein the second segment is connected to the control element of the first electron emitting device;
- a high-pass capacitor having a first and second terminal, wherein the first terminal is connected to the control element of the first electron emitting device, and the second terminal is connected to the first segment of the double-pole switch;
- and
- a variable attenuator having a third terminal, a fourth terminal, and a variable wiper element, wherein the variable wiper element is connected to the control element of the second electron emitting device, the third terminal is connected to the first segment of the double-pole switch, and the fourth terminal is connected to the second segment of the double pole switch;
- such that when the switch is in the first position, the first segment of the double-pole switch simultaneously couples the second terminal of the capacitor to the third terminal of the variable attenuator while the second segment decouples the fourth terminal of the variable attenuator from the control element of the first electron emitting device;
- and
- when the switch is in the second position, the second segment of the double-pole switch simultaneously couples the fourth terminal of the variable attenuator to the control element of the first electron emitting device while the first segment decouples the second terminal of the capacitor from the third terminal of the variable attenuator.
5 more elements
An amplifier comprising:
- a push-pull amplifier having at least one pair of first and second electron emitting devices, each electron emitting device including an electron source element, an electron receiving element and an electron control element;
- a single-pole-double-throw switch having a first and second position, and
- comprising a first terminal, a second terminal, and a pole, wherein the pole is connected to the control element of the first electron emitting device;
- a high-pass capacitor having a third and fourth terminal, wherein the third terminal is connected to the control element of the second electron emitting device;
- a first variable resistance element having a fifth and sixth terminal, wherein the fifth terminal is connected to the fourth terminal of the capacitor, and the sixth terminal is connected to the first terminal of the single-pole-double-throw switch;
- and
- a second variable resistance element having a seventh and eighth terminal, wherein the seventh terminal is connected to the control element of the second electron emitting device, and the eighth terminal is connected to the second terminal of the single-pole-double throw switch;
- such that when the switch is in the first position, the switch couples the sixth terminal of the first variable resistance element to the control element of the first electron emitting device and decouples the eighth terminal of the second variable resistance element from the control element of the first electron emitting device;
- and
- when the switch is in the second position, the switch couples the eighth terminal of the second variable resistance element to the control element of the first electron emitting device and decouples the sixth terminal of the first variable resistance element from the control element of the first electron emitting device.
7 more elements
An amplifier comprising:
- a push-pull amplifier having at least one pair of first and second electron emitting devices, each electron emitting device including an electron source element, an electron receiving element and an electron control element;
- a switch having a first and second position;
- a variable resistance element having a first and second terminal, wherein the first terminal is coupled to the control element of the first electron emitting device and the second terminal is coupled to the switch;
- and
- a high-pass capacitor having a third and fourth terminal, wherein the third terminal is coupled to the switch and the fourth terminal is coupled to the control element of the second electron emitting device;
- such that when the switch is in the first position, the second terminal of the variable resistance element is coupled to the third terminal of the capacitor, and the second terminal of the variable resistance element is decoupled from the control element of the second electron emitting device;
- and
- when the switch is in the second position, the second terminal of the variable resistance element is coupled to the control element of the second electron emitting device and the second terminal of the variable resistance element is decoupled from the third terminal of the capacitor.
5 more elements
Dependencies are inferred from the claim text.