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1. 发明申请

US20230013236A1 Class of potentiometers and analog circuits for linearly mixing signals 有权
公开(公告)号：US20230013236A1
公开(公告)日：2023-01-19
申请号：US17363901
申请日：2021-06-30
申请人： Donald L Baker
发明人： Donald L Baker
IPC分类号： G10H3/18 , G10H3/26
摘要： This invention presents a modular circuit using a 3-gang pot to mix and compensate two signals, to produce an output of approximately uniform volume. One gang, Pga, physically simulates a pseudo-sine function, Q(x), where 0≤×≤1 is fractional pot rotation. A second gang, Pgb, physically simulates a pseudo-cosine function, R(x). The circuits using Pga & Pgb multiply the two input signals by the pseudo-functions, so that the length, SQRT(Q2+R2), of vector (Q,R) stays near one. The third gang, Pgc, modifies the gain of a summer/compensator op-amp, U3, which adds the two modified signals and compensates for variations in amplitude due to phase cancellations between the two input signals, maintaining an output of near-constant amplitude. A number of embodiments consider 3-gang pots with linear, custom nonlinear and mixed tapers. Any of the three gangs may be replaced by a digital pot, driven by a programmable processor. The functions Q(x) and R(x) are also the basis for full-cycle approximate sine and cosine functions, apsin & apcos, which can be used for forward and reverse spectral transformations to predict the output of such a modular circuit from the inputs as modified by the three gangs. The modules can be cascaded or otherwise combined to add more input signals to the output. The primary application is humbucking pair signals from hum-matched single-coil electric guitar pickups, but there may be applications in other fields.

2. 发明授权

US10380986B2 Means and methods for switching odd and even numbers of matched pickups to produce all humbucking tones 有权
公开(公告)号：US10380986B2
公开(公告)日：2019-08-13
申请号：US16139027
申请日：2018-09-22
申请人： Donald L Baker
发明人： Donald L Baker
IPC分类号： G10H3/18 , G10H1/46 , G10H1/18 , G10H3/22 , G10H1/34
摘要： This invention discloses a switching system for any odd or even number of two or more matched vibrations sensors, such that all possible circuits of such sensors that can be produced by the system are humbucking, rejecting external interferences signals. The sensors must be matched, especially with respect to response to external hum and internal impedance, and be capable of being made or arranged so that the responses of individual sensors to vibration can be inverted, compared to another matched sensor, placed in the same physical position, while the interference signal is not. Such that for 2, 3, 4, 5, 6, 7 and 8 sensors, there exist 1, 6, 25, 90, 301, 966 and 3025 unique humbucking circuits, respectively, with signal outputs that can be either single-ended or differential. Embodiments of switching systems include electro-mechanical switches, programmable switches, solid-state digital-analog switches, and micro-controller driven solid state switches using time-series to spectral-series transforms to pick the order of tones from bright to warm and back.

3. 发明申请

US20190057678A1 Means and methods for switching odd and even numbers of matched pickups to produce all humbucking tones 审中-公开
公开(公告)号：US20190057678A1
公开(公告)日：2019-02-21
申请号：US16139027
申请日：2018-09-22
申请人： Donald L Baker
发明人： Donald L Baker
IPC分类号： G10H3/18 , G10H1/46 , G10H1/18 , G10H1/34 , G10H3/22
CPC分类号： G10H3/181 , G10H1/06 , G10H1/18 , G10H1/342 , G10H1/46 , G10H3/182 , G10H3/185 , G10H3/186 , G10H3/188 , G10H3/22 , G10H2220/505 , G10H2250/235
摘要： This invention discloses a switching system for any odd or even number of two or more matched vibrations sensors, such that all possible circuits of such sensors that can be produced by the system are humbucking, rejecting external interferences signals. The sensors must be matched, especially with respect to response to external hum and internal impedance, and be capable of being made or arranged so that the responses of individual sensors to vibration can be inverted, compared to another matched sensor, placed in the same physical position, while the interference signal is not. Such that for 2, 3, 4, 5, 6, 7 and 8 sensors, there exist 1, 6, 25, 90, 301, 966 and 3025 unique humbucking circuits, respectively, with signal outputs that can be either single-ended or differential. Embodiments of switching systems include electro-mechanical switches, programmable switches, solid-state digital-analog switches, and micro-controller driven solid state switches using time-series to spectral-series transforms to pick the order of tones from bright to warm and back.

4. 发明授权

US11087731B2 Humbucking pair building block circuit for vibrational sensors 有权
公开(公告)号：US11087731B2
公开(公告)日：2021-08-10
申请号：US16985863
申请日：2020-08-05
申请人： Donald L Baker
发明人： Donald L Baker
IPC分类号： G10H3/18 , G10H3/22 , G10H1/26 , G10H1/46 , G10H3/14 , G10H1/34
摘要： This invention eliminates most mechanical switching in vibrational pickup circuits by using variable gains to combine signals of sensors in differential amplifiers as J−1 humbucking pairs for J>1 number of sensors, with the sensors matched to produce the same level and phase of unwanted hum from external sources. It can also combine J>1 number of matched sensors with K>1 number of dissimilar sensors which are matched only to each other in the same manner. This produces not only all the possible mechanically switched humbucking signals, but all the continuously-varying combinations of humbucking signals in between.

5. 发明授权

US10991353B1 Modular single-coil pickup 有权
公开(公告)号：US10991353B1
公开(公告)日：2021-04-27
申请号：US16812870
申请日：2020-03-09
申请人： Donald L Baker
发明人： Donald L Baker
IPC分类号： G10H3/18
摘要： A modular single-coil electromagnetic stringed-instrument pickup, made to mount in replacement of a standard single-coil pickup, using the similar mounting screws and springs, has a replaceable base, core, blade pole and cover. The core unit has two flat coil forms glued to a bar magnet, which together form a trough for the coil. The outsides of the coil forms have printed circuits which form the coil end contacts and an integral electrostatic shield, with interconnect fixed after the coil is wound, so that the core unit can be flipped to change the magnetic polarity of the pickup, and thus the string vibration signal, while maintaining a humbucking pair circuit with equivalent pickup. The base, which can be either non-magnetic or ferro-magnetic material in different shapes and configurations to shape the magnetic field, contains three conductive index pins, which both make contact with the core unit contacts, and transmit string signals to any circuit or electrical contacts on the bottom of the base. The bottom of the base can be endowed with printed circuits, either on the base itself, or in flexible printed circuit soldered to the index pins.
An elastomer shim sits between the core unit and base to give support to the core and microphonic damping. The vertical blade pole sits on top of the core unit, embedded in a non-conductive, non-magnetic horizontal support plate, is held in place by the cover, and separate elastomer shims. The shim between the blade and core unit has a section directly under the blade filled with magnetic material to transmit the magnetic field from the magnet to the blade. The blade pole can be formed, ground or filed to different heights and shapes under the strings, so as to correct for signal strength or to affect the harmonic content of the string signal directly. By trading out the core, base and blade for different types, a wide variety of tonal characters can result, imitating several other types of pickups, as well as providing upgrades from passive pickups to those with active circuits on the base.

6. 发明授权

US11011146B2 More embodiments for common-point pickup circuits in musical instruments part C 有权
公开(公告)号：US11011146B2
公开(公告)日：2021-05-18
申请号：US16995101
申请日：2020-08-17
申请人： Donald L Baker
发明人： Donald L Baker
IPC分类号： G10H3/18 , H03G3/00 , H03G3/20
摘要： This invention continues and adds to the embodiments under Non-provisional patent application Ser. No. 16/840,644, adding circuits using small dual-coil humbucking pickups made to mount in the same holes as and replace single-coil pickups. It also develops circuits to match the value of tone capacitors to the lumped inductances of pickup circuits. A mechanical switching system for 3 single-sized humbuckers can produce 21 distinct tonal circuits from 48 different switch combinations, using a 6-way circuit switch and three 2-way mode switches. A digitally-controlled solid-state switching system can avoid the duplicate circuits, and control even more pickups for more tones. With such a switching system, the user can set the order of 2, 21, 120 and 705 distinct tonal circuits for 2, 3, 4 and 5 single-sized humbucking pickups, with expected extensions to larger numbers of pickups, and the caveat from previous work by this inventor that tones tend to bunch together at the warm end, decreasing the number of audibly distinct tones.

7. 发明授权

US10810987B2 More embodiments for common-point pickup circuits in musical instruments 有权
公开(公告)号：US10810987B2
公开(公告)日：2020-10-20
申请号：US16840644
申请日：2020-04-06
申请人： Donald L Baker
发明人： Donald L Baker
IPC分类号： G10H3/18 , G10H1/00
摘要： This invention refines and expands the use of mode switches in common-point connection circuits for matched pickups on musical instruments. For example, on a 3-coil S-type electric guitar, where the common-point connection circuit with a single-ended output provides three humbucking pair outputs and three humbucking triple outputs, a 4P2T mode switch can ground the common point and provide both all of the standard non-humbucking 5-way switch outputs, as well as adjusting the tone capacitor to make both humbucking and non-humbucking tone outputs more compatible. On an electric guitar with three dual-coil humbuckers, mode switches of one 6P2T, one 2P2T and three 1P2T can choose between dual-coil and single-coil operation modes, humbucking and non-humbucking modes, and partially simulate the effect of flipping single-coil magnets at will, by choosing which coil of each humbucker is used.

8. 发明授权

US10217450B2 Humbucking switching arrangements and methods for stringed instrument pickups 有权
公开(公告)号：US10217450B2
公开(公告)日：2019-02-26
申请号：US15616396
申请日：2017-06-07
申请人： Donald L Baker
发明人： Donald L Baker
IPC分类号： G10H3/18
摘要： This invention develops the math and topology necessary to determine the potential number of tonally distinct connections of sensors, musical vibration sensors in particular. It claims the methods and sensor topological circuit combinations, including phase reversals from inverting sensor connections, up to any arbitrary number of sensors, excepting those already patented or in use. It distinguishes which of those sensor topological circuit combinations are humbucking for electromagnetic pickups. It presents a micro-controller system driving a crosspoint switch, with a simplified human interface, which allows a shift from bright to warm tones and back, particularly for humbucking outputs, without the user needing to know which pickups are used in what combinations. It suggests the limits of mechanical switches and develops a pickup switching system for dual-coil humbucking pickups.

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