Back to results
US 8,570,139 B2Granted
Variable resister having resistance varying geometrically ratio and control method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorJongwoo Lee
Life of this patent
Estimating the term…
Abstract
Provided is an analog amplifier for amplifying an analog signal and an analog filter, and in particular, an apparatus and method for controlling gain and cutoff frequency of the variable gain amplifier and the variable cutoff frequency filter that is capable of changing the gain and cutoff frequency. The variable resister includes a plurality of resister segments in the variable resister and, when a plurality of resistance candidates for the variable resister are arranged in order of size, the resistance candidates form a geometric series.
Claims39
A variable resister comprising:
- a plurality of resister segments,
- wherein, when a plurality of resistance candidates for the variable resister are arranged in order of size, the resistance candidates have resistance values varying geometrically.
An analog signal amplifier comprising:
- a variable resister comprising:
- a plurality of resister segments,
- wherein, when a plurality of resistance candidates for the variable resister are arranged in order of size, the resistance candidates have resistance values varying geometrically;
- a loaded resister connected to the variable resister;
- and
- an operational amplifier connected to the variable resister and the loaded resister,
- wherein a gain is determined by a ratio of the variable resister to the loaded resister, and, when arranging a plurality of gain value candidates of the entire gain in order of size, the gain value candidates are changed geometrically.
4 more elements
An analog filter comprising:
- a variable resister comprising:
- a plurality of resister segments,
- wherein, when a plurality of resistance candidates for the variable resister are arranged in order of size, the resistance candidates have resistance values varying geometrically;
- a capacitor connected to the variable resister;
- and
- an operational amplifier connected to the variable resister and the capacitor,
- wherein the variable resister and the capacitor determine a cutoff frequency and, when a plurality of frequency value candidates of the cutoff frequency is arranged in order of size, the frequency value candidates vary geometrically.
4 more elements
A variable resister comprising:
- a plurality of variable resister unit blocks of which resistances, when arranged in order of size, vary geometrically,
- wherein the plural variable resister unit blocks are connected in series, and
- a connection state between ends of the plural variable resister unit blocks are changed according to a first control signal.
A variable resister for determining entire resistances based on a control signal, the variable resister comprising:
- a first resister segment;
- a plurality of second resister segments connected to the first resister segment in series;
- and
- a first switch connected between second resister segments and controlled by the control signal,
- wherein, when the entire resistances determined by the control signal are arranged in order of size, the resistance value varies geometrically from a reference resistance corresponding to a resistance of the first resister segment.
2 more elements
A method for controlling a variable resister, the method comprising:
- applying a control signal to the variable resister including a plurality of resister segments;
- and
- determining one of a plurality of resistance candidates by changing a connection state of at least one of the plurality of resister segments according to the control signal,
- wherein, when the plurality of resistance candidates available for the variable resister are arranged in order of size, the plurality of resistance candidates have the resistance values varying in geometric ratio.
1 more element
A method for controlling a variable resister, the method comprising:
- outputting a first control signal for selecting variable resister unit blocks connected in series in the variable resister and having resistances varying geometrically when arranged in order of size and a second control signal for selecting resistance segments in the variable resister unit blocks;
- and
- determining the resistance of the variable resister by selecting the variable resister unit blocks according to the first control signal and by selecting the resister segments in the variable resister unit blocks according to the second control signal.
A variable resister comprising:
- a plurality of resister segments, and
- a plurality of switches connected with the plurality of resister segments;
- wherein a resistance of the plurality of resister segments are determined to vary a total resistance of the variable resister exponentially according to a changing of a connection state of the plurality of switches.
An analog signal amplifier comprising:
- a variable resister comprising:
- a plurality of resister segments, and
- a plurality of switches connected with the plurality of resister segments,
- wherein a resistance of the plurality of resister segments are determined to vary a total resistance of the variable resister exponentially according to a changing of a connection state of the plurality of switches;
- a loaded resister connected to the variable resister;
- and
- an operational amplifier connected to the variable resister and the loaded resister,
- wherein an entire gain is determined by a ratio of the variable resister to the loaded resister, and, when arranging a plurality of gain value candidates of the entire gain in order of size, the gain value candidates are changed exponentially.
5 more elements
An analog filter comprising:
- a variable resister comprising:
- a plurality of resister segments, and
- a plurality of switches connected with the plurality of resister segments,
- wherein a resistance of the plurality of resister segments are determined to vary a total resistance of the variable resister exponentially according to a changing of a connection state of the plurality of switches;
- a capacitor connected to the variable resister;
- and
- an operational amplifier connected to the variable resister and the capacitor,
- wherein the variable resister and the capacitor determine a cutoff frequency and, when a plurality of frequency value candidates of the cutoff frequency is arranged in order of size, the frequency value candidates vary linearly.
5 more elements
A variable resister for determining entire resistances based on a control signal, the variable resister comprising:
- a first resister segment;
- a plurality of second resister segments connected to the first resister segment in series;
- and
- a first switch connected between second resister segments and controlled by the control signal,
- wherein a resistance of the plurality of second resister segments are determined to vary a total resistance of the variable resister exponentially from a reference resistance corresponding to a resistance of the first resister segment according to a changing of a connection state of the first switch.
2 more elements
A method for controlling a variable resister, the method comprising:
- applying a control signal to the variable resister including a plurality of resister segments;
- and
- determining a total resistance of the variable resister by changing a connection state of at least one of the plurality of resister segments according to the control signal,
- wherein a resistance of the plurality of resister segments are determined to vary the total resistance of the variable resister exponentially according to the control signal.
1 more element
Dependencies are inferred from the claim text.